save project

snake.py

@@ -53,10 +53,14 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+
     if x == apple_x and y == apple_y:
-        apple_x = random.randint(0,600)
-        apple_y = random.randint(0,480)
+        num1 = random.randint(1,22)
+        num2 = random.randint(1,16)
+        apple_x = 30*num1-30
+        apple_y = 30*num2-30
+    else:
+        position.pop(0)    
     
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -70,4 +74,4 @@ while True:
     screen.blit(food, (apple_x,apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(6)
\ No newline at end of file
+    FPSCLOCK.tick(8)
\ No newline at end of file