条件、循环、函数定义 练习

1.画五角星

import turtle
turtle.color('red')
turtle.fillcolor('blue')
turtle.begin_fill()
for i in range(5):
    turtle.forward(100)
    turtle.right(144)
turtle.end_fill()

2.画同心圆

import turtle
for i in range(5):
    turtle.up()
    turtle.goto(0,-20*(i+1))
    turtle.down()
    turtle.circle(20*(i+1))

3.画太阳花

import turtle
turtle.color('black')
turtle.fillcolor('pink')
turtle.begin_fill()
while True:
    turtle.forward(200)
    turtle.left(170)
    if(abs(turtle.pos()))<1:
        break

4.画五个五角星

import turtle
turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.bgcolor('red')
def my_goto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()
def my_draw5(r):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(r)
        turtle.right(144)
    turtle.end_fill()

my_goto(-700,250)
my_draw5(100)

my_goto(-520,350)
my_draw5(30)

my_goto(-450,280)
my_draw5(30)

my_goto(-450,200)
my_draw5(30)

my_goto(-520,120)
my_draw5(30)

5.画◇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('black')

    brad=turtle.Turtle()
    brad.shape('turtle')
    brad.color('yellow')
    brad.speed('fastest')
    for i in range(1,37):
        draw_diamond(brad)
        draw_diamond(brad)
        brad.left(10)

    brad.right(90)
    brad.forward(300)
    brad.hideturtle()
    window.exitionclick()

draw_art()