save project

snake.py

@@ -48,8 +48,12 @@ while True:
     else:
         y+=30
     l.append((x,y))
-    l.pop(0)
     
+    if x==apple_x and y==apple_y:
+        apple_x=random.randrange(0,660,30)
+        apple_y=random.randrange(0,480,30)
+    else:
+        l.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
@@ -59,9 +63,7 @@ while True:
         screen.blit(body,l[i])
         
     # 将果实画上去
-    if x==apple_x and y==apple_y:
-        apple_x=random.randrange(0,660,30)
-        apple_y=random.randrange(0,480,30)
+    
     screen.blit(food, (apple_x, apple_y))
     
     # 刷新画面