第 11 步：让我们创建一个随机索引来选择中间！
记住：列表中有 6 项，所以第一个索引是 0，最后一个索引是 5。
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########################################################################
# PLACE LIST CREATIONS HERE #
########################################################################
stage_list = ["moon", "mars", "jupiter", "pluto", "space", "city"]
head_list = ["head1", "head2", "head3", "head4", "head5", "head6"]
body_list = ["middle1", "middle2", "middle3", "middle4", "middle5", "middle6"]
########################################################################
# PLACE ALL OTHER CODE BELOW THIS #
########################################################################
stage_image = stage_list[1]
stage.set_background(stage_image)
random_head = random.randint(0, 5)
head_image = head_list[random_head]
# sprite = codesters.Sprite("image", x, y)
head = codesters.Sprite(head_image, 0, 83)
