pxt-calliope/docs/lessons/digi-yoyo/activity.md

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# digi yoyo activity
Create a counter with a while loop.
### ~avatar avatar
### @video td/videos/digi-yoyo-0
Welcome! This tutorial will teach how to create a counter with a while loop. Let's get started!
### ~
Create a variable that acts as a counter and set it to 0.
```blocks
let count = 0
```
Add a while loop that will loop over and over until the variable `count` equals 10.
```blocks
let count = 0
while (count < 10) {
}
```
Let's add a pause. Then show the value of the the count.
```blocks
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let count = 0;
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while (count < 10) {
basic.pause(100);
basic.showNumber(count)
}
```
Increase the value of count by one.
```blocks
let count = 0
while (count < 10) {
basic.pause(100)
basic.showNumber(count)
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count = count + (count - 1)
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}
```
### ~avatar avatar
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Excellent, you're ready to continue with the [challenges](/lessons/digi-yoyo/challenges)!
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### ~