diff --git a/board.lua b/board.lua
index 5b4a92e..bf45bfd 100644
--- a/board.lua
+++ b/board.lua
@@ -3,8 +3,8 @@ function Board.new()
   local debug = false
 
   local width = board_size
-  -- tiles
-  local tile_width = 8
+
+  local tile_width = 20
   -- pixels
   local padding = 1
   local tiles = {}
@@ -12,6 +12,16 @@ function Board.new()
   -- list of indexes
 
   local reset = function()
+    if width == 4 then
+      tile_width = 20
+    elseif width == 6 then
+      tile_width = 16
+    elseif width == 8 then
+      tile_width = 12
+    elseif width == 10 then
+      tile_width = 8
+    end
+    
     tiles = {}
     for i = 1, width * width do
       tiles[i] = 0
@@ -437,10 +447,15 @@ function Board.new()
         if color == 1 then fillp(▒) else fillp(█) end
         if self:is_locked(idx) then
           rectfill2(x, y, w, w, color)
+          pset(x + 1, y + 1, shade)
+          pset(x + w - 2, y + 1, shade)
+          pset(x + 1, y + w - 2, shade)
+          pset(x + w - 2, y + w - 2, shade)
         else
           roundedrect(x, y, w, w, color)
           line(x + 1, y + w - 1, x + w - 2, y + w - 1, shade)
           line(x + w - 1, y + 1, x + w - 1, y + w - 2, shade)
+          pset(x + w - 2, y + w - 2, shade)
         end
       else
         fillp(█)