# strobe light lesson

Learn how to create a blinking LED script. #LED #screen  #plot #docs

### @video td/videos/strobe-light-0

## Topic

For Loop

## Quick links

* [activity](/microbit/lessons/strobe-light/activity)
* [challenges](/microbit/lessons/strobe-light/challenges)

## Class

Year 7

## Documentation

* **For Loop**: [read more...](/microbit/reference/loops/for)
* **Plot**: [read more...](/microbit/reference/led/plot)
* **Unplot**: [read more...](/microbit/reference/led/unplot)
* **Pause**: [read more...](/microbit/reference/basic/pause)

## Objectives

* learn how to repeat code a fixed number of times
* learn how to turn on a LED light on the LED screen. Specify with LED using x, y coordinates
* learn how to turn off a LED light on the LED screen. Specify which LED which x, y coordinates
* learn how to pause program execution for the specified number of milliseconds

## Progression Pathways / Computational Thinking Framework

#### Algorithms

* Uses logical reasoning to predict outputs, showing an awareness of inputs. (AL)
* 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)
* Uses a variable and relational operators within a loop to govern termination. (AL) (GE)
* Uses a range of operators and expressions e.g. Boolean, and applies them in the context of program control. (AL)

#### 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

## Activity

* time: 10 min.
* [activity](/microbit/lessons/strobe-light/activity)

## Extended Activity

* time: 20 min.
* [challenges](/microbit/lessons/strobe-light/challenges)

## Homework

* Extended Activity: [challenges](/microbit/lessons/strobe-light/challenges)