auto save

snake.py

@@ -53,12 +53,13 @@ while True:
         y -= 30
         y -= 30
     else:
     else:
         y += 30
         y += 30
-    if x==apple_x and y==apple_y:
-        apple_x=random.randint(0,22)
-        apple_y=random.randint(0,16)
-        apple_x=apple_x*30
-        apple_y=apple_y*30
     position.append((x, y))
     position.append((x, y))
+    if x==apple_x and y==apple_y:
+        apple_x=random.randint(1,22)
+        apple_y=random.randint(1,16)
+        apple_x=apple_x*30-30
+        apple_y=apple_y*30-30
+    else:  
         position.pop(0)
         position.pop(0)
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))