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# looper lesson
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Learn to control blinking LEDs.
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### @video vimeo/134453504
## Topic
For loop - Blinking LED
## Quick links
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* [tutorial ](/lessons/looper/tutorial )
* [quiz ](/lessons/looper/quiz )
* [quiz answers ](/lessons/looper/quiz-answers )
* [challenges ](/lessons/looper/challenges )
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## 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.
## What the teacher needs to know
**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’ ** The blink program introduces a While Loop. While Loop is a while loop that will repeat code forever while - true.
**Command:** An instruction for the computer to execute, written in a particular programming language.**
**QuickStart Computing Glossary
## Documentation
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* **plot**: [read more... ](/reference/led/plot )
* **pause**: [read more... ](/reference/basic/pause )
* **for**: [read more... ](/reference/loops/for )
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## Resources
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* Activity: [tutorial ](/lessons/looper/tutorial )
* Activity: [quiz ](/lessons/looper/quiz )
* Extended Activity: [challenges ](/lessons/looper/challenges )
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## Objectives
* learn how to blink a light
* create a for loop that will loop through each x-value, y-value from 0 to 4.
* learn how to pause the light on and off
* learn how to repeat turning on and off the light
## Links to the National Curriculum Programmes of Study for Computing
## 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.
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* [tutorial ](/lessons/looper/tutorial )
* [quiz ](/lessons/looper/quiz )
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* assessment opportunities: loops, plot, pause, clear screen
## Extended Activity
* time: 20 min.
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* [challenges ](/lessons/looper/challenges )
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* assessment opportunities: loops, plot, pause, clear screen
## Homework
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* Extended Activity: [challenges ](/lessons/looper/challenges )
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## Intended follow on
Publish script to the classroom.
