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

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# rotation animation quiz
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Learn how to create a rotating image with a while loop.
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## Name
## Directions
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Use this activity document to guide your work in the [rotation animation tutorial](/lessons/rotation-animation/activity).
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Answer the questions while completing the tutorial. Pay attention to the dialogues!
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## 1. What is a " variable"?
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<br />
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## 2. Write the code to create a variable called foo that stores a boolean and initialize it to false.
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<br/>
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## 3. Explain why you use a while loop with a variable
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```blocks
let rotating = true;
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while (rotating) {
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basic.showLeds(`
. . . . .
. . . . .
. . # . .
. . . . .
. . . . .
`)
basic.showLeds(`
. . . . .
. . . . .
. . . . .
. . . . .
. . . . .
`)
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}
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```
<br/>
## 4. Draw the areas on the micro:bits to illustrate the code below. Explain why you chose to draw in those areas.
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```blocks
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basic.showLeds(`
. . # . .
. . # . .
. . # . .
. . # . .
. . # . .
`)
basic.showLeds(`
. . . . .
. . . . .
# # # # #
. . . . .
. . . . .
`)
basic.showLeds(`
. . . . #
. . . # .
. . # . .
. # . . .
# . . . .
`)
basic.showLeds(`
. . . . #
. . . # .
. . # . .
. # . . .
# . . . .
`)
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```
![](/static/mb/lessons/looper-2.png)
<br/>