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snake.py

@@ -42,14 +42,24 @@ while True:
                 setheading="down"
                 snake_head=down
 
+
+
     # 将背景图画上去
+    if setheading=="right":
         x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     position.append((x, y))
     position.pop(0)
     # 将贪吃蛇画上去
     screen.blit(background,(0,0))
     #screen.blit(right, (x, y))
     # 将贪吃蛇的身体画上去
+    screen.blit(snake_head,position[-1])
     for i in range(len(position)-1):
         screen.blit(body,position[1])