pygame学习之绘制圆

import pygame
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((600, 500))
pygame.display.set_caption("drawing a circle")
while True:
    for event in pygame.event.get():
        if event.type in (QUIT, KEYDOWN):
            exit()
    screen.fill((0, 0, 200))
    color = 255, 255, 0
    position = 300, 250
    radius = 100                 # 圆的半径
    width = 10
    pygame.draw.circle(screen, color, position, radius, width)
    pygame.display.update()