Drawing a Starry Sky with Python Turtle

This article teaches how to create a starry night scene using Python's turtle graphics library. It outlines the basic approach: placing stars at random canvas coordinates, assigning each a random size, and rotating them by random angles to achieve a natural look.

Key steps :

Stars appear at random positions on the canvas.

Each star has a random size.

Stars are drawn with random tilt angles.

The following code implements the described logic. It defines a star function that draws a single five‑pointed star, then loops to place multiple stars with random parameters.

<code>import turtle as t
from random import randint

def star(x,y,size,angle): #定义函数，绘制星星
    t.color('yellow')#设置星星的颜色
    t.pu()
    t.setpos(x,y)
    t.right(angle)
    t.begin_fill()#调用开始填充函数
    for i in range(5):#循环绘制五角星
        t.fd(size)
        t.left(72)
        t.fd(size)
        t.right(144)
    t.end_fill()#调用结束填充函数

t.TurtleScreen._RUNNING=True
t.setup(1000,800)#设置画布大小
t.hideturtle()#隐藏小海龟
t.speed(0) #设置画笔绘画速度
t.pensize(1)#设置画笔宽度
t.bgcolor('black') #设置画布背景颜色为黑色，星星要在黑夜里发光
t.pu()
for i in range(150):#循环绘制星星数量
    x=randint(-400,400)#星星的横坐标范围
    y=randint(-300, 300)#纵坐标范围
    s=randint(1,5)#设置星星大小范围
    a=randint(0,120)#角度范围
    star(x, y, s, a)#调用函数绘制星星
t.done()</code>

Running the script produces a black canvas dotted with yellow stars of varying sizes and orientations, resembling a night sky.