自动轨迹绘制方法画一面不上色的五星红旗

要画一面不上色的五星红旗，可以使用Python的turtle库来实现自动轨迹绘制。具体步骤如下：

1. 导入turtle库

import turtle

2. 创建画布和画笔对象

canvas = turtle.Screen()
pen = turtle.Turtle()

3. 设置画笔颜色和大小

pen.pencolor("red")
pen.pensize(3)

4. 绘制五角星

for i in range(5):
    pen.forward(100)
    pen.right(144)

5. 绘制红旗底部矩形

pen.right(18)
pen.forward(200)
pen.right(162)
pen.forward(300)
pen.right(162)
pen.forward(200)

6. 关闭画布

canvas.exitonclick()

完整代码如下：

import turtle

canvas = turtle.Screen()
pen = turtle.Turtle()

pen.pencolor("red")
pen.pensize(3)

for i in range(5):
    pen.forward(100)
    pen.right(144)

pen.right(18)
pen.forward(200)
pen.right(162)
pen.forward(300)
pen.right(162)
pen.forward(200)

canvas.exitonclick()

运行上述代码，即可看到自动绘制出一面不上色的五星红旗。