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Michal Moskal
2016-03-25 16:47:20 -07:00
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# smiley blocks quiz answers
This is the answer key for the [smiley quiz](/microbit/lessons/smiley/quiz).
## 1. Describe what `show LEDs` does
A function that will display an image on the LED screen
## 2. Why is there an extra empty frame after the smiley face?
![](/static/mb/lessons/smiley-0.png)
<br/>
The extra empty image with show LED creates a blinking smiley, allowing the micro:bit to alternate between showing the smiley and the empty screen.
## 3. Draw the image created with this code
![](/static/mb/blocks/lessons/smiley-3.png)
![](/static/mb/blocks/lessons/smiley-4.png)
## 4. Write the code to make this image
![](/static/mb/blocks/lessons/smiley-5.png)
![](/static/mb/blocks/lessons/smiley-6.png)