save project

snake.py

@@ -38,6 +38,14 @@ while True:
                 if event.key==locals.K_DOWN and heading!="up":
                     heading="down"
                     snakehead=down
+    if heading=="up":
+        y-=30
+    if heading=="left":
+        x-=30
+    if heading=="down":
+        y+=30
+    if heading=="right":
+        x+=30
     xy.append((x,y))
     xy.pop(0)
     # 将背景图画上去