# flashing heart blocks lesson

Learn how to create LED images with a global variable. #LED #screen  #plot #docs

### @video td/videos/flashing-heart-0

## Topic

Pause

## Quick links

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

## Class

Year 7

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

Learn how to `show LEDs` by showing an image on the LED screen. We will be learning how to create a blinking app using a forever loop as well as simple commands, such as show LEDs, pause, and clear screen.

## Documentation

* **forever**: [read more...](/microbit/reference/basic/forever)
* **show LEDs** : [read more...](/microbit/reference/basic/show-leds)
* **pause**: [read more...](/microbit/reference/basic/pause)
* **clear screen**: [read more...](/microbit/reference/basic/clear-screen)

## Objectives

* learn how to repeat code in the background forever
* learn how to show LEDs on the LED screen
* learn how to pause your code for the specified number of milliseconds
* learn how to turn off all the LED lights on the LED screen

## Progression Pathways / Computational Thinking Framework

#### Algorithms

* Understands that iteration is the repetition of a process such as a loop. (AL)
* Represents solutions using a structured notation. (AL) (AB)

#### Programming & Development

* Creates programs that implement algorithms to achieve given goals. (AL)
* Declares and assigns variables.(AB)

#### Data & Data Representation

* Understands the difference between data and information. (AB)
* Defines data types: real numbers and Boolean. (AB)

#### Information Technology

*  Collects, organises and presents data and information in digital content. (AB)
* Makes appropriate improvements to solutions based on feedback received, and can comment on the success of the solution. (EV)

Computational Thinking Concept: AB = Abstraction; DE = Decomposition; AL = Algorithmic Thinking; EV = Evaluation; GE = Generalisation

## Exercise

* time: 20 min.
* [activity](/microbit/lessons/flashing-heart/activity)
* [quiz](/microbit/lessons/flashing-heart/quiz)

## Extended Activity

* time: 20 min.
* [challenges](/microbit/lessons/flashing-heart/challenges)

## Homework

* Extended Activity: [challenges](/microbit/lessons/flashing-heart/challenges)