save project

snake.py

@@ -55,6 +55,12 @@ while True:
     else:
         y += 30
     position.append((x, y))
+    if x==apple_x and y==apple_y:
+        sa=random.randint(1,22)
+        sb=apple_y=random.randint(1,16)
+        apple_x=sa*30-30
+        apple_y=sb*30-30
+    else:    
         position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -66,10 +72,6 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-        
-    if x==apple_x and y==apple_y:
-        apple_x=random.randint(0,30)
-        apple_y=random.randint(0,16)
     screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()