47 lines
1.0 KiB
Markdown
47 lines
1.0 KiB
Markdown
# night light quiz answers
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Answers to the night light quiz. #LED #image #brightness #fade #docs
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This is the answer key for the [night light quiz](/microbit/lessons/night-light/quiz).
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## 1. Define the function "set brightness"
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This function sets the brightness of the LED screen.
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## 2. Consider the following image
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If the rectangle above represents the BBC micro:bit, write the code to set all the LEDs to full brightness and to turn on all the LEDs.
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<br />
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```
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led.setBrightness(255)
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led.plotAll()
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```
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## 3. Consider the following image
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If the rectangle above represents the BBC micro:bit, write the code to set the screen brightness to 50% (128) and turns on all the LEDs.
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<br/>
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```
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led.setBrightness(128)
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led.plotAll()
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```
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## 4. Consider the following image
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If the rectangle above represents the BBC micro:bit, write the code to turn off all the LEDs.
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```
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led.setBrightness(0)
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```
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