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In this add-on, you'll use cool effects in Scratch to make it look like the stadium is celebrating with the athletes.

First click on the stage to make sure you're programming it, not the sprite.

From the Looks menu, drag the change effect by block into the scripts area.

There's a drop-down with lots of different choices to explore.

Right now it reads change color effect by.

Click on the block.

The background changes colors.

Try a different effect from the drop-down, such as whirl, or fisheye.

Choose an effect you like.

To make the effect keep happening, from the control menu, place a repeat loop around the change effect by block.

Click on it and watch what it does.

Tinker with the values until you find something that works for you.

Try combining different effects.

Pretty cool!

You can reverse the effect by using the negative number opposite to the positive number you used, repeated the same number of times.

In this example, the sprite changes the fisheye effect by two, and the color effect by 10, 10 times.

Duplicate the block stack, you can put a negative sign in front of each of the numbers.

Test it.

The background expands then contracts, changing colors the whole time.


To return the background to how it looked with no effects, from the looks menu, use the clear graphic effects block.

To clear the background of effects when the green flag is clicked, place this block before the change effect by blocks.

Then from the events menu, place a when flag clicked block on the top of the stack.

Here's the game plan: change the backdrop graphics by clicking on the stage, then using the change effect by block.

Repeat the changed effects.

Clear the stage of all graphic effects when the flag is clicked.

Choose an Add-On

The Crowd Cheers

Make the crowd celebrate your victory.

The Stadium Goes Wild

Add cool effect to the stadium.

Celebration Dance

Make the sprite jump and spin.


  1. Choose an Add-On, and click "watch" to learn how to build it.
  2. Once you finish one Add-On, try another one below the video!