save project

snake.py

@@ -56,12 +56,15 @@ while True:
     else:
         y-=30
     
+    z.append((x,y))
     if apple_x==x and apple_y==y:
-        apple_x=random.randint(0,660)
-        apple_y=random.randint(0,480)
-
+        a_x=random.randint(0,21)
+        a_y=random.randint(0,15)
+        apple_x=a_x*30
+        apple_y=a_y*30
+    else:
         z.pop(0)
-    z.append((x,y))
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去