pxt-microbit/docs/lessons/smiley/quiz.md

micro:bit target for Microsoft MakeCode (PXT)

# smiley blocks quiz

Make a smiley face blink 

## Name

## Directions

Use the hints in the [Smiley](/lessons/smiley/activity) activity to answer this quiz!

## 1. Describe what `show LEDs` does


## 2. Why is there an extra empty frame after the smiley face?

![](/static/mb/lessons/smiley-0.png)



## 3. Draw the image created with this code

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

![](/static/mb/empty-microbit.png)

## 4. Draw the images created with this code

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

![](/static/mb/lessons/looper-3.png)