diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..1870410
Binary files /dev/null and b/.DS_Store differ
diff --git a/im-bw b/im-bw
new file mode 100755
index 0000000..f14b71d
--- /dev/null
+++ b/im-bw
@@ -0,0 +1 @@
+magick $@ -alpha off -threshold 30% bw.$@
diff --git a/im-crop b/im-crop
new file mode 100755
index 0000000..5316b0c
--- /dev/null
+++ b/im-crop
@@ -0,0 +1,11 @@
+IMG=$1
+CELL=25
+DX=$6
+DY=$7
+DW=$8
+DH=$9
+X=$(($2 * $CELL + $DX))
+Y=$(($3 * $CELL + $DY))
+W=$(($4 * $CELL + $DW))
+H=$(($5 * $CELL + $DH))
+magick $IMG -crop ${W}x${H}+${X}+${Y} crop.$IMG
diff --git a/im-mr b/im-mr
new file mode 100755
index 0000000..0de5d82
--- /dev/null
+++ b/im-mr
@@ -0,0 +1,3 @@
+IMG1=$1
+IMG2=$2
+magick $IMG1 $IMG2 +append mr.$IMG1.$IMG2
diff --git a/im-sz b/im-sz
new file mode 100755
index 0000000..70fe508
--- /dev/null
+++ b/im-sz
@@ -0,0 +1,5 @@
+IMG=$1
+CELL=25
+W=$(($2 * $CELL))
+H=$(($3 * $CELL))
+magick $IMG -resize ${W}x${H}\! sz.$IMG
diff --git a/res/bw.src-02.png b/res/bw.src-02.png
new file mode 100644
index 0000000..ca068e1
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diff --git a/res/crop.bw.src-02.png b/res/crop.bw.src-02.png
new file mode 100644
index 0000000..561ed3d
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diff --git a/res/src-02.png b/res/src-02.png
new file mode 100644
index 0000000..5d54409
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diff --git a/res/sz.crop.bw.src-02.png b/res/sz.crop.bw.src-02.png
new file mode 100644
index 0000000..c9fef4b
Binary files /dev/null and b/res/sz.crop.bw.src-02.png differ
diff --git a/res/tiles_0.png b/res/tiles_0.png
new file mode 100644
index 0000000..bfafcea
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diff --git a/res/tiles_01.png b/res/tiles_01.png
new file mode 100644
index 0000000..d8cb34a
Binary files /dev/null and b/res/tiles_01.png differ
diff --git a/res/tiles_02.png b/res/tiles_02.png
new file mode 100644
index 0000000..b20012d
Binary files /dev/null and b/res/tiles_02.png differ
diff --git a/res/tiles_1.png b/res/tiles_1.png
new file mode 100644
index 0000000..c9fef4b
Binary files /dev/null and b/res/tiles_1.png differ
diff --git a/v5/Window.py b/v5/Window.py
index e2afca2..94f3c39 100644
--- a/v5/Window.py
+++ b/v5/Window.py
@@ -1,28 +1,68 @@
 import arcade
 
+CELL = 25
+HEIGHT = 600
+WIDTH = 900
+
 class Window(arcade.Window):
   def __init__(self):
-    super().__init__(900, 600, "OGS Memory")
-    arcade.set_background_color(arcade.color.GRAY)
+    super().__init__(WIDTH, HEIGHT, "OGS Memory")
+    #arcade.set_background_color(arcade.color.GRAY)
+    arcade.set_background_color(arcade.color.WHITE)
     self.all_sprites = arcade.SpriteList()
 
-    # Animated begin button.
-    player = arcade.AnimatedTimeBasedSprite()
-    for i in range(2):
-      tex = arcade.load_texture("res/buttons_begin.png", x = i*350, y = 0, width = 350, height = 100)
-      player.append_texture(tex)
-      player.color = arcade.color.BLUE
-      a = arcade.sprite.AnimationKeyframe(i, 700, tex)
-      player.frames.append(a)
-      player.center_x = 300
-      player.center_y = 200
+#    # Animated begin button.
+#    player = arcade.AnimatedTimeBasedSprite()
+#    for i in range(2):
+#      tex = arcade.load_texture("res/buttons_begin.png", x = i*350, y = 0, width = 350, height = 100)
+#      player.append_texture(tex)
+#      #player.color = arcade.color.BLUE
+#      a = arcade.sprite.AnimationKeyframe(i, 700, tex)
+#      player.frames.append(a)
+#      player.center_x = 300
+#      player.center_y = 200
+#    self.all_sprites.append(player)
+
+    positions = [
+      [9, 1],
+      [14, 1],
+      [19, 1],
+      [24, 1],
+
+      [9, 7],
+      [14, 7],
+      [19, 7],
+      [24, 7],
 
-    self.all_sprites.append(player)
+      [9, 13],
+      [14, 13],
+      [19, 13],
+      [24, 13],
+
+      [9, 19],
+      [14, 19],
+      [19, 19],
+      [24, 19],
+    ]
+
+    add_tiles(self.all_sprites, positions)
 
   def on_draw(self):
     arcade.start_render()
-    arcade.draw_circle_filled(400, 300, 15, arcade.color.BLUE)
+    #arcade.draw_circle_filled(400, 300, 15, arcade.color.BLUE)
     self.all_sprites.draw()
 
   def on_update(self, delta):
     self.all_sprites.update_animation()
+
+def add_tiles(sprites, positions):
+    for p in positions:
+      tile = arcade.AnimatedTimeBasedSprite()
+      for i in range(2):
+        tex = arcade.load_texture("res/tiles_0.png", x = i*75, y = 0, width = 75, height = 100)
+        tile.append_texture(tex)
+        a = arcade.sprite.AnimationKeyframe(i, 700, tex)
+        tile.frames.append(a)
+        tile.center_x = CELL * 2 + p[0] * CELL
+        tile.center_y = HEIGHT - CELL * 2 - p[1] * CELL
+      sprites.append(tile)