--- a/thing.py	Mon Aug 22 18:48:31 2011 +0200
+++ b/thing.py	Mon Aug 22 19:01:59 2011 +0200
@@ -14,6 +14,29 @@
         depth = getattr(self.parent, 'depth', None)
         self.rect.midbottom = (self.parent.rect.midbottom[0], depth)
 
+class DoorSprite(display.Sprite):
+    def __init__(self, x, y, vertical):
+        if vertical:
+            tx = 1
+        else:
+            tx = 0
+        super(DoorSprite, self).__init__(x, y, 'things.png', tx, 0)
+        self.animation = None
+
+    def update(self):
+        if self.animation:
+            try:
+                self.animation.next()
+            except StopIteration:
+                self.animation = None
+
+    def anim_open(self):
+        self.depth += 2
+        for step in range(8):
+            yield
+            self.rect.move_ip(0, -2)
+
+
 
 class Thing(object):
     tx, ty = 0, 1
@@ -22,24 +45,25 @@
     def __init__(self, x, y):
         self.x = x
         self.y = y
+        self.sprite = display.Sprite(self.x, self.y, 'things.png',
+                                     self.tx, self.ty)
 
     def render(self, to_display):
-        self.sprite = display.Sprite(self.x, self.y, 'things.png',
-                                     self.tx, self.ty)
         to_display.sprites.add(self.sprite)
         to_display.shadows.add(ShadowSprite(self.sprite))
 
 
 class Door(Thing):
-    tx, ty = 0, 0
-
     def __init__(self, x, y, vertical):
         self.x = x
         self.y = y
         self.blocks = True
         self.vertical = vertical
-        if self.vertical:
-            self.tx = 1
+        self.sprite = DoorSprite(self.x, self.y, self.vertical)
+
+    def hit(self):
+        self.sprite.animation = self.sprite.anim_open()
+        self.blocks = False
 
 
 class Entrance(Thing):