#   a114_nested_loops_4.py
import time
import turtle as trtl

painter = trtl.Turtle()
painter.penup()
painter.goto(-200, 0)
painter.pendown()

x = -200
y = 0
move_x = 1
move_y = 1
while x < 200:
    while y < 100:
        x = x + move_x
        y = y + move_y
        painter.goto(x, y)
    move_y = -1

    while y > 0:
        x = x + move_x
        y = y + move_y
        painter.goto(x, y)
    move_y = 1
# print("dd")
# time.sleep(10)
x = -200
y = 0
move_x = 1
move_y = -1  # 初始y方向改为向下
painter.penup()
painter.goto(-200, 0)
painter.pendown()
while x < 200:
    while y > -100:  # 变为负值
        x = x + move_x
        y = y + move_y
        print("上:", x, y)
        painter.goto(x, y)
    move_y = 1  # 现在向上移动

    while y < 0:
        x = x + move_x
        y = y + move_y
        print("下:", x, y)
        painter.goto(x, y)
    move_y = -1  # 恢复向下的方向


wn = trtl.Screen()
wn.mainloop()

user_data = ("TJ", 24, "artLover123")

# 创建一个包含4部电影的列表
favorite_movies = ["Movie1", "Movie2", "Movie3", "Movie4"]

# 打印列表中的第0个元素
print(favorite_movies[0])

# 将第0个元素设置为“星球大战”
favorite_movies[0] = "星球大战"

# 再次打印列表中的第0个元素
print(favorite_movies[0])

size = 20
x = 100
y = 200
ball = Circle(size)
circle.set_position(x, y)