Scratch LoopsForever, Repeat & Until
Master all three types of loops in Scratch. Learn how to animate sprites, draw shapes, build timers, and create game logic — all using loops!
What is a Loop?
🔁 What is a Loop?
Imagine you want your sprite to move 10 steps — not once, but 50 times in a row. Would you stack 50 "move 10 steps" blocks? That would take forever! A loop solves this: it runs the same blocks over and over automatically, without you having to repeat yourself.
✅ Without a loop (messy!)
move 10 steps
move 10 steps
move 10 steps
… (×50 times)
✅ With a loop (clean!)
repeat (50)
move 10 steps
end
Done in 2 lines!
🧠 Key Idea
A loop is a block that wraps around other blocks and runs them multiple times. Scratch has three types of loops:
- Forever — repeats endlessly
- Repeat (N) — repeats a set number of times
- Repeat Until — repeats until a condition becomes true
🌍 Real-world analogy
Think of brushing your teeth. You don't just move the brush once — you keep repeating the motion for 2 minutes. That repetition is a loop! Every time you go back and forth, you're running one iteration of the loop.
♾️
Forever
Animations, game logic
🔢
Repeat (N)
Known repetitions
🎯
Repeat Until
Condition-based stopping
Interactive Loop Simulator
Experiment with different loops and see how they work!
The loop will repeat the action exactly 5 times.
What's Happening?
The Repeat loop runs the blocks inside it a fixed number of times. Right now it will repeat 5 times. You can change the number and see how it affects the animation!
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