# smiley blocks lesson 

design a blinking image lesson #docs

### @video td/videos/smiley-0

## Topic 

Show LEDs

## Quick Links

* [activity](/microbit/lessons/smiley/activity)
* [quiz](/microbit/lessons/smiley/quiz)
* [quiz answers](/microbit/lessons/smiley/quiz-answers)
* [challenges](/microbit/lessons/smiley/challenges)

## Prior learning/place of lesson in scheme of work 

Learn how to **show LEDs** to turn on a LED light pattern on the LED screen. We will be learning basic comments such as show LEDs and pause.

## Documentation

* **show LEDs** : [read more...](/microbit/reference/basic/show-leds)
* **on button pressed** : [read more...](/microbit/reference/input/on-button-pressed)

```cards
input.onButtonPressed(Button.A, () => {})
basic.showLeds(`
    . . . . .
    . . . . .
    . . # . .
    . . . . .
    . . . . .
    `)
```

## Objectives

* learn how to show LEDs on the LED screen
* learn how to run code when an input button is pressed

