Nicer temporary colour well.

robotgame/block.py

@@ -190,10 +190,14 @@ class ColorWell(Block):
         self.__dict__.update(locals())
         worldobject.WorldObject.__init__(
             self, level, x, y, movable=False)
-        self.img = pygame.Surface((128, 96))
-        self.set_colour(0, 0, 0)
+        self.img = pygame.Surface((64, 64))
 
     def set_colour(self, r, g, b):
         self.well_colour = r * 255, g * 255, b * 255
         self.img.fill(self.well_colour)
 
+    def draw(self, window):
+        if self.visible:
+            window.blit(self.img, (self.x - self.level.camera_x,
+                                   self.y - self.img.get_size()[1]
+                                   - self.level.camera_y))