pxt-calliope/docs/lessons/rotation-animation/quiz.md

# rotation animation quiz

Learn how to create a rotating image with a while loop.

## Name

## Directions

Use this activity document to guide your work in the [rotation animation tutorial](/lessons/rotation-animation/activity).

Answer the questions while completing the tutorial. Pay attention to the dialogues!

## 1. What is a " variable"?

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## 2. Write the code to create a variable called foo that stores a boolean and initialize it to false.

<br/>

## 3. Explain why you use a while loop with a variable

```blocks
let rotating = true;
while (rotating) {
    basic.showLeds(`
        . . . . .
        . . . . .
        . . # . .
        . . . . .
        . . . . .
        `)
    basic.showLeds(`
        . . . . .
        . . . . .
        . . . . .
        . . . . .
        . . . . .
        `)
}

```

<br/>

## 4. Draw the areas on the @boardname@s to illustrate the code below. Explain why you chose to draw in those areas.

```blocks
basic.showLeds(`
        . . # . .
        . . # . .
        . . # . .
        . . # . .
        . . # . .
        `)
basic.showLeds(`
        . . . . .
        . . . . .
        # # # # #
        . . . . .
        . . . . .
        `)
basic.showLeds(`
        . . . . #
        . . . # .
        . . # . .
        . # . . .
        # . . . .
        `)
basic.showLeds(`
        . . . . #
        . . . # .
        . . # . .
        . # . . .
        # . . . .
        `)
   
```

![](/static/mb/lessons/looper-2.png)

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