51 lines
1.4 KiB
Markdown
51 lines
1.4 KiB
Markdown
# rotation animation block lesson
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Learn how to create images with a global variable and while loop.
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## Topic
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While Loop
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## Quick links
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* [activity](/microbit/lessons/rotation-animation/activity)
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* [challenges](/microbit/lessons/rotation-animation/challenges)
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* [quiz](/microbit/lessons/rotation-animation/quiz)
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* [quiz answers](/microbit/lessons/rotation-animation/quiz-answers)
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## Prior learning/place of lesson in scheme of work
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Learn how to create images that look like a rotating animation by using a while loop. We will be learning how to create a rotating animation using a global variable, while loop as well as simple commands, such as on button pressed and show animation.
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## Documentation
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```docs
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let x = 0
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input.onButtonPressed(Button.A, () => {
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})
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basic.showLeds(`
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. . . . .
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. . . . .
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. . # . .
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. . . . .
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. . . . .
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`)
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basic.pause(100)
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while (true) {
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basic.pause(20)
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}
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```
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## Objectives
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* learn how to create a variable for a place where you can store data, accessible across functions, and in nested code blocks
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* learn how to set or change the value of a variable
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* learn how to repeat code while a condition is true
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* learn how to declare a boolean variable to determine which code will execute next
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* learn how to run code when an input button is pressed
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* learn how to show a series of image frames on the LED screen
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* learn how to pause your code for the specified number of milliseconds
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