43 lines
1.0 KiB
Markdown
43 lines
1.0 KiB
Markdown
# night light challenges
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Coding challenges for the night light tutorial. #docs
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## Before we get started
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Complete the following guided tutorial:
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* [tutorial](/microbit/lessons/night-light/tutorial)
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At the end of the tutorial, click `keep editing`. Your code should look like this:
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```
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led.setBrightness(255)
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led.plotAll()
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input.onButtonPressed(Button.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 td/videos/night-light-2
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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 an event handler with `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(Button.A, () => {
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led.setBrightness(64)
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})
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input.onButtonPressed(Button.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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Add an event handler with `input->on screen up` to change the LED brightness back to a `255`.
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* `Run main` your script to see the LEDs change brightness.
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