Remixing a Program to Make It Better

Remixing means taking an existing program and changing it to make it your own or improve it.

Reading is good — doing is better. Practice Remixing a Program to Make It Better as an interactive lesson.

Definition

Remixing a program means you start with someone else's (or your own) finished project and make changes to it — like adding new characters, changing the background, fixing a bug, or making it do something new. Instead of starting from scratch, you build on what is already there and make it better or different.

Remember the rule

See it → Try it → Change it → Share it! Start with the original, run it, make one improvement at a time, then share your remix.

Key words

Remix: To take an existing program or project and change parts of it to make something new or better.
Program: A set of step-by-step instructions a computer follows to do something, like a game or animation.
Sprite: A character or object in a coding program, like a cat or a car, that you can move and control.
Bug: A mistake in a program that makes it not work the right way.
Debug: To find and fix a bug so the program works correctly.
Block: A puzzle-shaped piece of code you snap together to give instructions to a sprite.
Background: The picture or scene behind the sprites in a program.
Original: The first version of a program before any changes are made.

Worked examples

A classmate's program has a cat that walks across the screen but does nothing else. How could you remix it?

→ Add a block that makes the cat say 'Hello!' when it reaches the other side of the screen. · Adding a new action to an existing sprite is one of the easiest and most fun remixes.

A program has a plain white background and a bouncing ball. How can you remix it to make it look more exciting?

→ Click on the background and choose a new one, like an outer space scene, so the ball bounces through space. · Changing the background does not break any of the code — it just makes the program look much better.

You remix a jumping game but the character jumps way too fast and it is too hard to play. What do you fix?

→ Find the number in the 'move 10 steps' block and change it to a smaller number, like 3, so the character jumps more slowly. · Changing a number inside a block is called changing a parameter, and it is a powerful way to improve a program.

The original program only has one sprite. How can you remix it to make it more interesting?

→ Add a second sprite, like a dog, and give it its own blocks so it barks when you click on it. · Adding a new sprite with new code makes the program do more things without deleting what was already there.

A program is supposed to play a sound when the sprite is clicked, but nothing happens. How do you remix and fix it?

→ Look at the blocks and find that the 'play sound' block is missing. Drag it in and connect it under the 'when clicked' block. · Finding a missing block and adding it back is called debugging, and it is an important part of remixing.

Common mistakes

Deleting all the original blocks by accident before understanding what they do — always read through the code first.
Changing too many things at once so you do not know which change caused a problem — change one thing, then test it.
Forgetting to save the remix, so all your changes disappear — click Save often while you work.
Thinking a remix has to be totally different — even one small improvement, like a new sound or color, counts as a remix.
Not giving credit to the original creator — always note whose project you started with when you share your remix.

FAQs

Is remixing the same as copying?

No. Copying means you use something exactly as it is. Remixing means you take something and change or improve it, so it becomes a new version. You are building on someone else's work and adding your own ideas.

Do I have to ask permission before remixing someone's program?

On most kid-safe coding sites like Scratch, programs are shared so that others are allowed to remix them. It is still polite to give credit by writing the original creator's name in your project notes.

What if I break the program while remixing it?

That is okay and totally normal! Try to undo the last change by pressing Ctrl+Z, or look at what you changed and put it back. Making mistakes and fixing them is how programmers learn.

How many things should I change in a remix?

Even one change makes it a remix. For beginners, try changing just one or two things at a time so you can see exactly what each change does to the program.

Can I remix my own program?

Yes! Going back to your own project and improving it is a great habit. Programmers call this updating or improving a program, and it is how programs get better over time.

What makes a remix 'better' than the original?

A remix is better when it is more fun, easier to use, has fewer bugs, looks nicer, or does something the original could not do. Better does not have to mean harder — sometimes simpler is better!

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