预览：我们已经知道如何创建一个列表并使用循环访问该列表中的每个项目。
但是，如果您只想使用列表中的一项怎么办？为此，您使用索引。
To navigate the page using the TAB key, first press ESC to exit the code editor.
########################################################################
# PLACE LIST CREATIONS HERE #
########################################################################
stage_list = ["summer", "underwater", "flowers",
"mars", "subway","soccerfield"]
head_list = ["head1", "head2", "head3",
"head4", "head5", "head6"]
body_list = ["middle1", "middle2", "middle3",
"middle4", "middle5", "middle6"]
legs_list = ["legs1", "legs2", "legs3",
"legs4", "legs5", "legs6"]
########################################################################
# PLACE ALL OTHER CODE BELOW THIS #
########################################################################
head_image = head_list[3]
display_which_head = codesters.Text(head_image, 100, 83)
head = codesters.Sprite(head_image, 0, 83)
rand_number = random.randint(0,5)
body_image = body_list[rand_number]
display_which_body = codesters.Text(body_image, 100, 0)
body = codesters.Sprite(body_image, 0, 0)
rand_numb2 = random.randint(0,5)
legs_image = legs_list[rand_numb2]
display_which_legs = codesters.Text(legs_image, 100, -83)
legs = codesters.Sprite(legs_image, 0, -83)
stage_index = int(head.ask("Choose an index between 0 and 5."))
stage_image = stage_list[stage_index]
stage.set_background(stage_image)
