条件、循环、函数定义

1.用循环画五角星

import turtle
turtle.setup(600,400,0,0)
turtle.color("yellow")
turtle.bgcolor(‘red‘)
turtle.fillcolor("yellow")
turtle.up()
turtle.goto(-250,75)
turtle.down()
turtle.begin_fill()
for i in range(5):
    turtle.forward(100)
    turtle.right(144)
turtle.end_fill()

2.用循环画同心圆

from turtle import*
for i in range(5):
    up()
    goto(0,-20*(i))
    down()
    circle(20*i)

3.用while循环画太阳花

from turtle import*

color(‘red‘,‘blue‘)
begin_fill()
while True:
    forward(200)
    left(170)
    if (abs(pos()))<1:
        break
end_fill()
done()

4.用函数定义画五个五角星

import turtle
turtle.setup(600,400,0,0)
turtle.color("yellow")
turtle.bgcolor(‘red‘)
turtle.fillcolor("yellow")
turtle.up()
turtle.goto(-250,75)
turtle.down()
turtle.begin_fill()
for i in range(5):
    turtle.forward(100)
    turtle.right(144)
turtle.end_fill()

turtle.up()
turtle.goto(-100,-10)
turtle.down()
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.left(144)
turtle.end_fill()

turtle.up()
turtle.goto(-50,50)
turtle.down()
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)
turtle.end_fill()

turtle.up()
turtle.goto(-50,120)
turtle.down()
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)
turtle.end_fill()

turtle.up()
turtle.goto(-100,160)
turtle.down()
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.left(144)
turtle.end_fill()

turtle.color("red")

5.用函数定义画钻石花瓣的太阳花

import turtle

def draw_diamond(brad):
    brad.forward(100)
    brad.right(45)
    brad.forward(100)
    brad.right(135)

def draw_art():

    window=turtle.Screen()
    window.bgcolor("purple")

    brad=turtle.Turtle()
    brad.shape("turtle")
    brad.color("orange")
    brad.speed("fastest")

    for i in range(0,36):
        draw_diamond(brad)
        draw_diamond(brad)
        brad.left(10)

    brad.right(90)
    brad.forward(155)
    brad.color(‘green‘)
    brad.forward(145)

    window.exitonclick()

draw_art()