# smiley blocks lesson 

Design a blinking image lesson

## Topic 

Show LEDs

## Quick Links

* [activity](/lessons/smiley/activity)
* [quiz](/lessons/smiley/quiz)
* [quiz answers](/lessons/smiley/quiz-answers)
* [challenges](/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](/reference/basic/show-leds)**
* **[on button pressed](/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

