diff --git a/ai.lua b/ai.lua
index b440121..fec5ba0 100644
--- a/ai.lua
+++ b/ai.lua
@@ -20,6 +20,7 @@ end
 function t.load( filename )
   local img, imgd = bmp.load( filename )
   local nodes = { 
+    filename = filename,
     visible = true,
     all = {},
     att = {},
@@ -77,8 +78,8 @@ function t.draw( nodes )
   lg.points( nodes.ptsDef )
 end
 
-function t.save( nodes, filename )
-
+function t.save( nodes )
+  return bmp.savePoints( nodes.all, "512rgb24" )
 end
 
 return t
\ No newline at end of file
diff --git a/bmp.lua b/bmp.lua
index 81afbf4..64d35b0 100644
--- a/bmp.lua
+++ b/bmp.lua
@@ -7,6 +7,41 @@ local lfs = love.filesystem
 local ffi = require 'ffi'
 local bit = require 'bit'
 
+local function getHeader( filename )
+  local offset = love.data.unpack( "<I4", assert(love.filesystem.read( "data", filename, 14 )), 11 )
+  local header, size = assert( love.filesystem.read( filename, offset ) )
+  print( "BMP HEADER", filename, size, "\n", header )
+  return header
+end
+
+local formats = {
+  ["512rgb24"] = {
+    header = getHeader( "data/earth/africa.bmp" ),
+    encode = function( r ) return math.floor( r * 255 ) end,
+    bytesPerPixel = 3,
+    w = 512,
+    h = 285,
+  },
+  ["512r4"]     = {
+    header = getHeader( "data/earth/sailable.bmp" ),
+    encode = function( r ) return math.floor( r * 255 / 16 )  end,
+    bytesPerPixel = 0.5,
+    w = 512,
+    h = 285,
+  },
+  ["800r4"]     = {
+    header = getHeader( "data/earth/travel_nodes.bmp" ),
+    encode = function( r ) return math.floor( r * 255 / 16 ) end,
+    bytesPerPixel = 0.5,
+    w = 512,
+    h = 285,
+  }
+}
+
+function t.header( format )
+  return formats[format] and formats[format].header
+end
+
 function t.load( filename )
   local imgd = love.image.newImageData( filename )
   print( "LOADING BITMAP: ", filename, imgd:getSize(), imgd:getFormat(), imgd:getDimensions() )
@@ -15,15 +50,93 @@ function t.load( filename )
   return img, imgd
 end
 
-function t.save( data, filename, format )
-  local w, h = data:getDimensions()
-  local str = ""
-  for x = 0, w - 1 do
-    for y = 0, h - 1 do
-      
-    end  
+--maps an array of 1-byte pixel values  (numbers 0 to 15 inclusive)
+--to an array of half-byte pixel values (which can be concatenated into a string)
+--BUT don't touch the first element (which is assumed to be a header or something)
+local function foldByteArray( bytes )
+  local nybbles = { bytes[1] }
+  for j = 2, #bytes / 2 do
+    local a, b = bytes[ 2 * j - 2 ], bytes[ 2 * j - 1 ]
+    nybbles[j] = string.char( 16 * a + b )
   end
-  return str
+  return nybbles
 end
 
+local function packTwentyFour( bytes )
+  local twentyFour = { bytes[1] }
+  for j = 2, #bytes do
+    bytes[j] = string.char( bytes[j], bytes[j], bytes[j] )
+  end
+end
+
+function t.save( data, format )
+  local w, h = data:getDimensions()
+  format = assert( formats[format] )
+  local bytes = { format.header }
+  format.byte = 0
+  local i = 2
+  for x = 0, w - 1 do
+    for y = 0, h - 1 do
+      bytes[i] = format.encode( data:getPixel(x, y) )
+      i = i + 1
+    end  
+  end
+  if format.bytesPerPixel < 1 then bytes = foldByteArray( bytes )
+  else packTwentyFour( bytes ) end
+  return table.concat( bytes )
+end
+
+--takes an array of world-space points in [-180, 180] x [-100, 100] 
+--e.g { { x = 0.5, y = 0.5 }, { x = 0.4, y = 0.6 }, }, etc.
+--and a function which maps points to colours
+function t.savePoints( points, format )
+  format = assert( formats[format] )
+
+  --set up bitmap as an array of pixels
+  local w, h = format.w, format.h
+  local size = 2 + format.w * format.h
+  local bitmap = { format.header }
+  for j = 2, size do bitmap[j] = 0 end
+
+  --this is black-and-white only. easy case
+  if format.bytesPerPixel < 1 then
+    for i, point in ipairs( points ) do
+      local wx, wy = point.x, point.y
+      --get bitmap coordinates
+      local x, y = math.floor(format.w * (wx + 180) / 360), math.floor(format.h * (1.0 - (wy + 100) / 200))
+      --get index into byte array
+      local idx = 2 + x * format.h + y
+      bitmap[idx] = 0x0f --0b00001111
+    end
+    --now map pixels to 4-bit strings, slap on the header, and pass it back up
+    return table.concat( foldByteArray( bitmap ) )
+  end
+
+  --cf. ai.lua: these points can be red or green
+  for i, point in ipairs( points ) do
+    local wx, wy = point.x, point.y
+    --get bitmap coordinates
+    local x, y = math.floor(format.w * (wx + 180) / 360), math.floor(format.h * (1.0 - (wy + 100) / 200))
+    --get index into byte array
+    local idx = 2 + x * format.h + y
+    --in-editor we could have two points in the same place, possibly of the same or different types
+    --in case we miss something upstream, don't corrupt these duplicate points,
+    --just saturate the attack/defense value
+    if bitmap[idx] == 0 then bitmap[idx] = { attack = point.attacking, place = not(point.attacking)}
+    else 
+      bitmap[idx].attack = bitmap[idx].attack or point.attacking
+      bitmap[idx].place  = bitmap[idx].place  or not(point.attacking)
+    end
+  end
+
+  --now map pixels to 3-byte strings
+  for j = 2, size do
+    if   bitmap[j] == 0
+    then bitmap[j] = "\0\0\0"
+    else bitmap[j] = string.char( bitmap[j].attack and 0xff or 0, bitmap[j].place and 0xff or 0, 0 )
+    end
+  end
+
+  return table.concat( bitmap )
+end
 return t
\ No newline at end of file
diff --git a/button.lua b/button.lua
index 244174f..adee847 100644
--- a/button.lua
+++ b/button.lua
@@ -8,6 +8,7 @@ local t = {
   y = 250,
   w = 176,
   h = 24,
+  group = false,
   visible = true,
   callback = function( self ) return print( "clicked button: ", self.name, self.x, self.y, self.w, self.h, self.visible ) end
 }
@@ -68,6 +69,27 @@ function t.selectIn( x, y )
   repeat t.selected = t.selected.next until (t.selected == t) or (t.selected.visible and t.selected:contains( x, y ))
 end
 
+function t.selectNextInGroup()
+  local group = t.selected and t.selected.group
+  if not group then return t.selectNext() end
+  repeat t.selectNext() until group == t.selected.group
+end
+
+function t.selectPrevInGroup()
+  local group = t.selected and t.selected.group
+  if not group then return t.selectPrev() end
+  repeat t.selectPrev() until group == t.selected.group
+end
+
+function t.displayGroup( group, show )
+  local b = t
+  repeat 
+    b = b.next
+    b.visible = ( b.group == group )
+  until b == t
+  t.visible = true
+end
+
 function t.deselect( b )
   t.selected = t
 end
diff --git a/cities.lua b/cities.lua
index aa467b0..cbda997 100644
--- a/cities.lua
+++ b/cities.lua
@@ -45,19 +45,19 @@ local citymt = {__index = city}
 function city:formatDisplayInfo()
   return (
     [[
-    NAME:    %s
-    COUNTRY:   %s
-    LONGITUDE: %3.2f
-    LATITUDE:  %3.2f
-    POP:       %d
-    CAPITAL:   %s]]):format( self.name, self.country, self.x, self.y, self.pop, tostring(self.capital) )
+  NAME:    %s
+  COUNTRY:   %s
+  LONGITUDE: %3.2f
+  LATITUDE:  %3.2f
+  POP:       %d
+  CAPITAL:   %s]]):format( self.name, self.country, self.x, self.y, self.pop, tostring(self.capital) )
 end
 
 function t.load( filename )
   
   print( "=== LOADING CITIES. ===" )
 
-  cities = { visible = true, active = false }
+  cities = { visible = true, active = false, filename = filename }
   local n = 1
   local idxPts = 1
   local idxCaps = 1
@@ -97,8 +97,7 @@ function t.load( filename )
   return cities
 end
 
-function t.save( cities, filename )
-  print( "=== SAVING CITIES ===" )
+function t.save( cities )
   local str = {}
   for n, city in ipairs( cities ) do
     str[n] = ("%-41s%-41s%-14f%-14f%-19d %d"):format(
diff --git a/conf.lua b/conf.lua
index d6e6811..1670470 100644
--- a/conf.lua
+++ b/conf.lua
@@ -13,7 +13,7 @@ function love.conf(t)
     t.window.title = "dcEarth"          -- The window title (string)
     t.window.icon = "icons/favicon.png" -- Filepath to an image to use as the window's icon (string)
     t.window.width = 800                -- The window width (number)
-    t.window.height = 600               -- The window height (number)
+    t.window.height = 640               -- The window height (number)
     t.window.borderless = false         -- Remove all border visuals from the window (boolean)
     t.window.resizable = true           -- Let the window be user-resizable (boolean)
     t.window.minwidth = 512             -- Minimum window width if the window is resizable (number)
diff --git a/icons/city.bmp b/icons/city.bmp
new file mode 100644
index 0000000..5c28f85
Binary files /dev/null and b/icons/city.bmp differ
diff --git a/icons/cursorerase.png b/icons/cursorerase.png
new file mode 100644
index 0000000..7790fd1
Binary files /dev/null and b/icons/cursorerase.png differ
diff --git a/icons/cursorselect.png b/icons/cursorselect.png
new file mode 100644
index 0000000..3ce5ee1
Binary files /dev/null and b/icons/cursorselect.png differ
diff --git a/icons/undo.bmp b/icons/undo.bmp
new file mode 100644
index 0000000..88bcfd0
Binary files /dev/null and b/icons/undo.bmp differ
diff --git a/icons/up.bmp b/icons/up.bmp
new file mode 100644
index 0000000..3ad3d1b
Binary files /dev/null and b/icons/up.bmp differ
diff --git a/lines.lua b/lines.lua
index 0cd8bd7..2b67877 100644
--- a/lines.lua
+++ b/lines.lua
@@ -8,15 +8,15 @@ local polymt = { __index = polygon }
 
 function polygon:formatDisplayInfo()
   return ([[
-    x: %f
-    y: %f
-    X: %f
-    Y: %f
-    N: %d]]):format( self.x, self.y, self.X, self.Y, #self )
+  x: %f
+  y: %f
+  X: %f
+  Y: %f
+  N: %d]]):format( self.x, self.y, self.X, self.Y, #self )
 end
 
 function t.load( filename )
-  local polys = { visible = true }
+  local polys = { visible = true, filename = filename }
   local poly = {}
   local n = 1
   local k = 1
@@ -72,8 +72,7 @@ function t.selectNearest( lines, wx, wy )
   return nearest
 end
 
-function t.save( lines, filename )
-  print( "=== SAVING LINES ===" )
+function t.save( lines )
   local str = {}
   for i, poly in ipairs( lines ) do
     str[i] = table.concat( poly, " " )
diff --git a/main.lua b/main.lua
index 1db3b3b..a51c04e 100644
--- a/main.lua
+++ b/main.lua
@@ -1,10 +1,10 @@
 local love = assert( love, "This tool requires LOVE: love2d.org" )
 --assert( require('mobdebug') ).start() --remote debugger
 local map = require 'map'
+local savemodal = require 'savemodal'
 local button = require 'button'
 local SAVEDIRECTORY = "out/"
 local Camera = require 'camera'
-local wasKeyPressed
 
 function love.load()
 
@@ -13,7 +13,7 @@ function love.load()
   assert( lfs.createDirectory( SAVEDIRECTORY.."data/earth" ))
   assert( lfs.createDirectory( SAVEDIRECTORY.."data/graphics" ))
 
-
+  love.keyboard.setKeyRepeat( true )
   love.graphics.setNewFont( 14 )--, "mono" )
 end
 
@@ -43,7 +43,7 @@ end
 function love.draw()
   if not map.loaded then
     local w, h = love.graphics.getDimensions()
-    return love.graphics.printf( "Drag and drop folder to begin.", w / 2 - 200, h / 2 - 128, 200, "center")
+    return love.graphics.printf( "Drag and drop folder to begin.", w / 2 - 200, h / 2 - 128, 400, "center")
   end
 
   love.graphics.push( "all" )
@@ -59,9 +59,10 @@ function love.draw()
   love.graphics.rectangle( "fill", 0, 0, 250, love.graphics.getHeight() )
   love.graphics.setColor( 1, 1, 1, 1 )
   love.graphics.print(([[
-    SCREEN%8d%8d
-    WORLD %8.2f%8.2f
-    BITMAP%8.2f%8.2f]]):format(x, y, wx, wy, bx, by), 0, 0)
+  SCREEN  %-12d %-12d
+  WORLD   %-12.2f%-12.2f
+  BITMAP   %-12.2f%-12.2f
+  %s]]):format(x, y, wx, wy, bx, by, map.editLayer and map.editLayer.filename or ""), 0, 0)
 
   if map.selected then love.graphics.print( map.selected:formatDisplayInfo(), 0, 80 ) end
   if map.selectionLocked then end
@@ -75,13 +76,16 @@ function love.resize(w, h)
 end
 
 function love.wheelmoved(x, y)
-  Camera.Zoom( (y > 0) and 0.5 or -0.5 )
+  Camera.Zoom( (y > 0) and 0.1 or -0.1 )
 end
 
 function love.mousepressed( x, y, mouseButton, istouch, presses )
   local wx, wy = Camera.GetWorldCoordinate( x, y )
-  print( ("MOUSE\tx %f\ty %f\twx %f\twy %f"):format(x, y, wx, wy) )
-  if button.selected and button.selected:contains( x, y ) then button.selected:callback() end
+
+  if button.selected and button.selected:contains( x, y ) then 
+    print( ("MOUSE\tx %f\ty %f\twx %f\twy %f"):format(x, y, wx, wy) )
+    return button.selected:callback()
+  end
 end
 
 function love.mousemoved( x, y, dx, dy, istouch )
@@ -97,15 +101,13 @@ function love.mousemoved( x, y, dx, dy, istouch )
 end
 
 function love.keypressed(key, code, isRepeat)
-  wasKeyPressed = true
 
-  if code == "down"   then return button.selectNext() end
-  if code == "up"     then return button.selectPrev() end
+  if code == "left"   then return button.selectPrev() end
+  if code == "right"  then return button.selectNext() end
+  if code == "down"   then return button.selectNextInGroup() end
+  if code == "up"     then return button.selectPrevInGroup() end
   if code == "return" then return button.selected:callback() end
 
-  if key == "l" then
-    return map.save()
-  end
   if key == "c" then
     map.selectionLocked = not( map.selectionLocked )
   end
@@ -115,8 +117,6 @@ end
 
 do
 
-  button.new{ name = "UNDO", y = 250, callback = map.undo }
-
   local function toolCallback( self )
     local f = (map.layers[self.layer])[self.name]
     if f then return f(self) end
@@ -136,23 +136,8 @@ do
     v.visible = false
   end
 
-
   local layerButtons = {}
 
-  local function back( self )
-    for k, button in pairs( tools ) do button.visible = false end
-    for k, button in pairs( layerButtons ) do button.visible = true end
-    self.visible = false
-    map.editLayer = false
-  end
-
-  local backButton = button.new{
-    name = "BACK", 
-    visible = false,
-    y = 250 + button.h + 4,
-    callback = back,
-  }
-
   local layers = {
     { name = "AF",    layer = "africa"       },
     { name = "EU",    layer = "europe"       },
@@ -185,13 +170,17 @@ do
         button.icon = false
       end
     end
+    self.icon = soloIcon
+    
     for k, layer in pairs( map.layers ) do
       print( "invisible layer, map:", k, layer)
       layer.visible = false
     end
     map.layers[ self.layer ].visible = true
+    
   end
 
+  local backButton
   local function editLayer( self )
     map.editLayer = map.layers[ self.layer ]
     for k, button in pairs( layerButtons ) do button.visible = false end
@@ -212,32 +201,60 @@ do
 
 
   local y = 250
+  local soloButtons = {}
+  local showButtons = {}
+  local editButtons = {}
   for i = 1, #layers do
-
-    layerButtons[ 3 * i - 2 ] = button.new( copy( i, { 
+    editButtons[i] = button.new( copy( i, { 
           x = 8,
           y = y + (button.h + 4) * i,
           w = 112,
-          callback = editLayer
+          callback = editLayer,
+          group = "edit",
         }))
+    layerButtons[ 3 * i - 2 ] = editButtons[i]
 
-    layerButtons[ 3 * i - 1 ] = button.new( copy( i, {
+    showButtons[i] = button.new( copy( i, {
           x = 128,
           y = y + (button.h + 4) * i,
           w = 24,
           name = "V",
           callback = toggleVisibleLayer,
           icon = visibilityIcon,
+          group = "show",
         }))
+    layerButtons[ 3 * i - 1 ] = showButtons[i]
 
-    layerButtons[ 3 * i    ] = button.new( copy( i, {
+    soloButtons[i] = button.new( copy( i, {
           x = 160,
           y = y + (button.h + 4) * i,
           w = 24,
           name = "S",
           callback = soloVisibleLayer,
-          icon = soloIcon
+          icon = soloIcon,
+          group = "solo",
         }))
+    layerButtons[ 3 * i    ] = soloButtons[i]
   end
+
+
+  local function back( self )
+    for k, button in pairs( tools ) do button.visible = false end
+    for k, button in pairs( layerButtons ) do button.visible = true end
+    self.visible = false
+    map.editLayer = false
+  end
+
+  backButton = button.new{
+    name = "UP", 
+    visible = false,
+    y = 250 + button.h + 4,
+    icon = love.graphics.newImage( "icons/up.bmp" ),
+    callback = back,
+  }
+
+  button.new{ name = "UNDO", y = 250, callback = map.undo, icon = love.graphics.newImage( "icons/undo.bmp" ) }
+  button.new{ name = "SAVE", y = 222, callback = savemodal.start, icon = false }
+
 end
 
diff --git a/mainmenu.lua b/mainmenu.lua
new file mode 100644
index 0000000..e69de29
diff --git a/map.lua b/map.lua
index d024fb3..c2801a7 100644
--- a/map.lua
+++ b/map.lua
@@ -177,27 +177,18 @@ function map.draw()
 
 end
 
---[[local function write( filename, string )
-  os.rename( filename, filename..".bak" ) --just in case :^)
-  local file = assert( io.open( filename, "w+" ) )
-  assert( file:write( string ) )
-  file:close()
-end]]
-
 local function write( filename, string )
   print( "Pretending to write", string:len(), "bytes to", filename )
+  --[[  os.rename( filename, filename..".bak" ) --just in case :^)
+  local file = assert( io.open( filename, "w+" ) )
+  assert( file:write( string ) )
+  file:close()]]
 end
 
 function map.save()
-  write( map.path.."/data/earth/cities.dat", map.cities:save())
-  write( map.path.."/data/earth/coastlines.dat", map.coastlines:save())
-  write( map.path.."/data/earth/coastlines-low.dat", map.coastlinesLow:save())
-  write( map.path.."/data/earth/international.dat", map.international:save())
-  map.sailable:save()
-  map.travelnodes:save()
-  map.ainodes:save()
-  for k, v in pairs(map.territory) do
-    map.territory[k]:save()
+  for k, layer in pairs( layers ) do
+    print( "SAVING:", k, tostring( layer.filename ) )
+    write( map.path..tostring( layer.filename ), assert( layer:save() ) )
   end
 end
 
diff --git a/modal.lua b/modal.lua
new file mode 100644
index 0000000..552a8c9
--- /dev/null
+++ b/modal.lua
@@ -0,0 +1,51 @@
+local love = assert( love )
+local button = require( "button" )
+local t = {}
+t.__index = t
+
+local i = 0
+function t.start( self )
+  i = i + 1
+  t[i] = t[i] or {}
+  
+  --store callbacks
+  for name in pairs( self ) do
+    if love[name] then
+      t[i][name] = love[name]
+      love[name] = self[name]
+    end
+  end
+  
+  --store menus
+  local b = button.next
+  repeat 
+    t[i][b] = b.visible
+    b = b.next
+  until b == button
+end
+
+function t.stop( self )
+  --restore callbacks
+  for name in pairs( self ) do
+    if love[name] then
+      love[name] = t[i][name]
+    end
+  end
+  
+  --restore menus
+  local b = button
+  repeat 
+    b = b.next
+    b.visible = t[i][b]
+  until b == button
+  
+  t[i] = nil
+  i = i - 1
+  
+end
+
+function t.new( modal )
+  return setmetatable( modal or {}, t )
+end
+
+return t
\ No newline at end of file
diff --git a/savemodal.lua b/savemodal.lua
new file mode 100644
index 0000000..5f54ffc
--- /dev/null
+++ b/savemodal.lua
@@ -0,0 +1,52 @@
+local love = assert( love )
+local modal = require( "modal" )
+local button = require( "button" )
+local map = require( "map" )
+local t = {}
+
+local saveLocation = map.path
+local saveButton = button.new{   
+  group = "saveModal",
+  name = "save",
+  callback = function() map.save(); return t:stop() end,
+  visible = false,
+  x = 20,
+  y = 20,
+  w = 400,
+  h = 100,
+}
+
+local cancelButton = button.new{
+  group = "saveModal",
+  name = "cancel",
+  visible = false,
+  callback = function() return t:stop() end,
+  x = 20,
+  y = 150,
+  w = 400,
+  h = 100
+  }
+
+function t.start()
+  modal.start( t )
+  button.selected = saveButton
+  saveButton.name = "save to "..map.path
+  button.displayGroup( "saveModal", true )
+end
+
+function t.draw()
+  love.graphics.clear( 0,0,0,1 )
+  love.graphics.setColor( 1, 1, 1, 0.5 )
+  button:draw()
+  
+end
+
+function t.directorydropped( path )
+  saveLocation = path
+  map.path = path
+  saveButton.name = "save to "..map.path
+  return love.filesystem.mount( path, "" )
+end
+
+
+return modal.new( t )
\ No newline at end of file
diff --git a/territory.lua b/territory.lua
index 8ef3382..4209102 100644
--- a/territory.lua
+++ b/territory.lua
@@ -18,6 +18,7 @@ function t.load( filename, name )
   local territory = { 
     visible = true, 
     name = name,
+    filename = filename,
     colour = colours[name],
     border = {},
     img = img,
@@ -145,7 +146,7 @@ function t.computeBorder( territory, threshold, key )
 end
 
 function t.save( territory )
-  
+  return bmp.save( territory.imgd, "512rgb24" )
 end
 
 return t
\ No newline at end of file
diff --git a/textinput.lua b/textinput.lua
new file mode 100644
index 0000000..e206d56
--- /dev/null
+++ b/textinput.lua
@@ -0,0 +1,64 @@
+local love = assert( love )
+local utf8 = require("utf8")
+local modal = require( "modal" )
+local t = modal.new{ }
+
+function t.setCurrentModal( fields )
+  t.currentModal = assert( fields )
+  t.currentIdx = 1
+  return t:start()
+end
+
+function t.draw()
+  if not t.currentModal then return end
+  love.graphics.setColor( 0, 0, 0, 0.3 )
+  love.graphics.rectangle("fill", 0, 0, love.graphics.getDimensions())
+
+
+  -- other fields
+  for i, field in ipairs( t.currentModal ) do
+    love.graphics.setColor( 1, 1, 1, 0.2 )
+    local mode = (i == t.currentIdx) and "fill" or "line"    
+    love.graphics.rectangle( mode, 200, i * 28, 200, 14, 4 )
+    love.graphics.setColor( 1, 1, 1, 1 )
+    love.graphics.print( field.name, 8, i * 28 )
+    love.graphics.print( field.value, 216, i * 28 )
+  end
+end
+
+function t.textinput( char )
+  if t.currentModal then 
+    local field = t.currentModal.currentFieldIdx
+    t.currentModal.currentField.value = t.currentModal.currentField.value .. char
+  end
+end
+
+function t.keypressed(key, code, isRepeat)
+  if code == "down" then
+    t.currentIdx = t.currentIdx + 1
+    if t.currentIdx > #(t.currentModal) then
+      t.currentIdx = 1
+    end
+  elseif code == "up" then
+    t.currentIdx = t.currentIdx - 1
+    if t.currentIdx < 1 then
+      t.currentIdx = #(t.currentModal)
+    end
+  end
+
+  if key == "backspace" then
+    -- get the byte offset to the last UTF-8 character in the string.
+    local byteoffset = utf8.offset(text, -1)
+
+    if byteoffset then
+      -- remove the last UTF-8 character.
+      -- string.sub operates on bytes rather than UTF-8 characters, so we couldn't do string.sub(text, 1, -2).
+      text = string.sub(text, 1, byteoffset - 1)
+    end
+  end
+  if key == "escape" then
+    return t:stop()
+  end
+end
+
+return t
\ No newline at end of file
diff --git a/travelNodes.lua b/travelNodes.lua
index bdb807f..b554d3c 100644
--- a/travelNodes.lua
+++ b/travelNodes.lua
@@ -54,7 +54,7 @@ function t.load( filename, sailable )
 
   isSailable = sailable
   local img, imgd = bmp.load( filename )
-  local nodes = { visible = true, nodes = {}, points = {}, connections = {}, img = img }
+  local nodes = { filename = filename, visible = true, nodes = {}, points = {}, connections = {}, img = img }
   local n = 1
   for x = 0, 799 do
     for y = 0, 399 do
@@ -106,8 +106,8 @@ function t.drawConnections( nodes )
 
 end
 
-function t.save( nodes, filename )
-
+function t.save( nodes )
+  return bmp.savePoints( nodes.nodes, "800r4")
 end
 
 return t
\ No newline at end of file