预览：在我们开始制作我们的第一个程序之前，让我们看一个例子。
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stage.set_background("underwater")
sprite = codesters.Sprite("applecore")
sprite.glide_to(-200, -200)
sprite = codesters.Sprite("sodacan")
sprite.glide_to(200, -200)
sprite = codesters.Sprite("fish")
sprite.set_speed(2)
sprite.move_down(150)
stage.wait(1)
sprite.say("Click on me!")
def click():
sprite.say("Don't litter!")
sprite.move_up(100)
sprite.turn_right(360)
sprite.move_down(100)
sprite.say("Save the oceans by saving me!")
sprite.set_x_speed(5)
sprite.event_click(click)
