55 lines
1.2 KiB
Markdown
55 lines
1.2 KiB
Markdown
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# set brightness challenges
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These challenges will allow you to change the brightness of the micro:bit. #docs
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**Challenge 0**
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### @video vimeo/133782335
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[This tutorial](/microbit/lessons/set-brightness/tutorial) will show you how to set the brightness on the micro:bit.
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```
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led.setBrightness(255)
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led.plotAll()
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input.onButtonPressed("A", () => {
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led.setBrightness(64)
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})
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```
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**Challenge 1**
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### @video vimeo/133782335
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What if we want to turn off all the LEDs? Let's do this by setting the brightness to `0` when button `B` is pressed. Add a condition for `input->on button pressed("B")`.
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```
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led.setBrightness(255)
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led.plotAll()
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input.onButtonPressed("A", () => {
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led.setBrightness(64)
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})
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input.onButtonPressed("B", () => {
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}) // ***
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```
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**Challenge 2**
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Inside of the condition `input->on button pressed("B")`, add `led->set brightness(0)` to turn off the LEDs.
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```
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led.setBrightness(255)
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led.plotAll()
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input.onButtonPressed("A", () => {
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led.setBrightness(64)
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})
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input.onButtonPressed("B", () => {
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led.setBrightness(0) // ***
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})
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```
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**Challenge 3**
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Now, in the condition `input->on button pressed("B")`, add `basic->pause(1000)` and then set the brightness to a new value!
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* `Run` your script to see the LEDs change brightness.
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