# flashing heart lesson

Learn how to create LED images with a global variable.

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

## Topic

Pause

## Quick links

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

## Class

Year 7

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

Learn how to **plot image** by turning on a series of LED lights 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 plot image, pause, and clear screen.

## What the teacher needs to know / QuickStart Computing Glossary

**Program:** A stored set of instructions encoded in a language understood by the computer that does some form of computation, processing input and/or stored data to generate output.**

**Algorithm:** An unambiguous set of rules or a precise step-by-step guide to solve a problem or achieve a particular objective. The guided tutorial follows a algorithm and is a precise step-by-step guide to solve a problem**

**Loop:** A block of code repeated automatically under the program’s control. ** The blink program introduces Forever. Forever will repeats code in the background forever.

**Command:** An instruction for the computer to execute, written in a particular programming language.**

## Documentation

* **forever**: [read more...](/reference/basic/forever)
* **plot image** : [read more...](/reference/led/plot-image)
* **pause**: [read more...](/reference/basic/pause)
* **clear screen**: [read more...](/reference/basic/clear-screen)

## Objectives

* learn how to repeat code in the background forever
* learn how to turn on a series of LED lights 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](/lessons/flashing-heart/activity) or [tutorial](/lessons/flashing-heart/tutorial)
* [quiz](/lessons/flashing-heart/quiz)

## Extended Activity

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

## Homework

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

## Intended follow on

Publish script to the classroom.