pxt-calliope/docs/lessons/screen-wipe/quiz-answers.md

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# screen wipe quiz blocks answers
Clear the screen by pressing the "A" button after an animation has been played
This is the answer key for the [screen wipe quiz](/microbit/lessons/screen-wipe/quiz).
## 1. What does the function "clear screen" do on the micro:bit?
This function turns off all the LED lights on the LED screen.
## 2. Write the line of code that displays this image.
![](/static/mb/blocks/lessons/screen-wipe-4.png)
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```blocks
basic.showLeds(`
. # . # .
. # . # .
. . # . .
# . . . #
. # # # .
`)
```
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## 3. Write the condition that will detect on button A pressed
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```blocks
input.onButtonPressed(Button.A, () => {
})
```
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## 4. Write the code that will clear show LEDS from the screen after pressing button A
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```blocks
input.onButtonPressed(Button.A, () => {
basic.clearScreen()
})
```
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