import turtle
import random

screen = turtle.Screen()
screen.setup(400, 500)
screen.bgcolor('#0a0a40')

pen = turtle.Turtle()
pen.hideturtle()
pen.speed(0)

# Draw 30 random stars
pen.color('white')
for i in range(30):
    star_x = random.randint(-200, 200)
    star_y = random.randint(-250, 250)
    pen.penup()
    pen.goto(star_x, star_y)
    pen.dot(3)

screen.mainloop()

_{Project 3 — Step 1 of 4}

⭐ Step 1 — Draw the background

➡️ Paint a dark night sky with 30 random white stars.

This is your first for loop in a real program. We tell Python “do this 30 times” and each turn it picks a random spot and dots a star there.

✏️ What to type

In the editor, add the night sky setup and the star loop:

import turtle
import random

screen = turtle.Screen()
screen.setup(400, 500)
screen.bgcolor('#0a0a40')

pen = turtle.Turtle()
pen.hideturtle()
pen.speed(0)

pen.color('white')
for i in range(30):
    star_x = random.randint(-200, 200)
    star_y = random.randint(-250, 250)
    pen.penup()
    pen.goto(star_x, star_y)
    pen.dot(3)

screen.mainloop()

import turtle
import random

screen = turtle.Screen()
screen.setup(400, 500)

# Make the background dark blue (#0a0a40)
# Then draw 30 random white stars using a for loop

screen.mainloop()

Tap ▶ Run. A dark blue rectangle with 30 little white dots should appear — a starry night. ✨

🔍 Tip

for i in range(30): means “do the indented block 30 times.” i is just a counter — you don’t have to use it inside the loop.

Each loop turn picks a fresh random star_x and star_y, so the stars land in different places.

Next → Step 2

_{⬅ Back to Project 3}

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_{Adapted from Raspberry Pi Foundation — Rocket Launch under CC BY-SA 4.0.}