（一）簡介

（二）練習

import turtle

def main():
    turtle.pensize(3)
    turtle.penup()
    turtle.goto(-200,-50)
    turtle.pendown()
    turtle.begin_fill()
    turtle.color("red")
    turtle.circle(40, steps=3)
    turtle.end_fill()


    turtle.penup()
    turtle.goto(-100,-50)
    turtle.pendown()
    turtle.begin_fill()
    turtle.color("blue"
 
)
    turtle.circle(40, steps=4)
    turtle.end_fill()

    turtle.penup()
    turtle.goto(0,-50)
    turtle.pendown()
    turtle.begin_fill()
    turtle.color("green")
    turtle.circle(40, steps=5)
    turtle.end_fill()

    turtle.penup()
    turtle.goto(100,-50)
    turtle.pendown()
    turtle.begin_fill()
    turtle.color("yellow"
 
)
    turtle.circle(40, steps=6)
    turtle.end_fill()

    turtle.penup()
    turtle.goto(200,-50)
    turtle.pendown()
    turtle.begin_fill()
    turtle.color("purple")
    turtle.circle(40)
    turtle.end_fill()

    turtle.color("green")
    turtle.penup()
    turtle.goto(-100,50)
    turtle.pendown()
    turtle.write(("Cool Colorful shapes"
 
),
        font = ("Times", 18, "bold"))
    turtle.hideturtle()

    turtle.done

if __name__ == '__main__':
    main()