# looper blocks lesson

Learn to control blinking LEDs. #LED #screen  #for #docs

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

## Topic

For Loop

## Quick links

* [activity](/microbit/lessons/looper/activity)
* [challenges](/microbit/lessons/looper/challenges)

## Class

Year 7

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

Learn how to control a blinking LED. We will be learning how to create a blinking app using the for loop as well as simple commands, such as plot and pause.

## Documentation

* **for**: [read more...](/microbit/reference/loops/for)
* **show number**: [read more...](/microbit/reference/basic/show-number)
* **pause**: [read more...](/microbit/reference/basic/pause)
* **arithmetic operators**: [read more...](/microbit/reference/types/number)

## Objectives

* learn how to repeat code a fixed number of times
* learn how to show a number on the LED screen, one digit at a time (scrolling from left to right)
* learn how to pause program execution for the specified number of milliseconds
* learn how to arithmetic operators operate on numbers and return a number

## 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/looper/activity)

## Extended Activity

* time: 20 min.
* [challenges](/microbit/lessons/looper/challenges)

## Homework

* Extended Activity: [challenges](/microbit/lessons/looper/challenges)