146 lines
2.7 KiB
Markdown
146 lines
2.7 KiB
Markdown
# rotation animation block challenges
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Coding challenges for the rotation animation.
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## Before we get started
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Complete the following guided activity:
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* [activity](/lessons/rotation-animation/activity)
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At the end of the activity, your code should look like this:
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```blocks
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let rotating = true;
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while (rotating) {
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basic.pause(20)
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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.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.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.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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}
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```
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### Challenge 1
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Now let's add to this by creating a condition for on button pressed `A` before the while loop. We will also introduce serial writeLine for the while loop and input OnButtonPressed
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```blocks
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let rotating = true;
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while (rotating) {
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serial.writeLine("loop")
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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.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.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.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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}
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input.onButtonPressed(Button.A, () => {
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serial.writeLine("hello")
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})
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```
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### Challenge 2
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Now that we have the on button pressed condition, let's make the animation stop rotating by setting the rotating global variable to false when button `A` is pressed.
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```blocks
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let rotating = true;
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while (rotating) {
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serial.writeLine("loop")
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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.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.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.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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}
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input.onButtonPressed(Button.A, () => {
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serial.writeLine("hello")
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rotating = false
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})
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```
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* Run the code to see the awesome rotation.
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### Challenge 3
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Let's also make the image rotate the opposite way when button A is pressed! We can do this with another while loop that is only executed while `not rotating`.
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