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file management quizzes

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docs/reference/js/lessons/night-light/quiz-answers.md
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# night light quiz answers
Answers to the night light quiz. #LED #image #brightness #fade #docs
This is the answer key for the [night light quiz](/microbit/lessons/night-light/quiz).
## 1. Define the function "set brightness"
This function sets the brightness of the LED screen.
## 2. Consider the following image
![](/static/mb/lessons/night-light-0.png)
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.
<br />
```
led.setBrightness(255)
led.plotAll()
```
## 3. Consider the following image
![](/static/mb/lessons/night-light-1.png)
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.
<br/>
```
led.setBrightness(128)
led.plotAll()
```
## 4. Consider the following image
![](/static/mb/lessons/night-light-2.png)
If the rectangle above represents the BBC micro:bit, write the code to turn off all the LEDs.
```
led.setBrightness(0)
```

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docs/reference/js/lessons/night-light/quiz.md
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# night light quiz
change the brightness of the BBC micro:bit #LED #image #brightness #fade #docs
## Name
## Directions
Use this activity document to guide your work in the [night light tutorial](/microbit/lessons/night-light/tutorial)
Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. Describe what "led->set brightness" does ?
## 2. If the picture below is the BBC micro:bit, write the code that sets all the LEDs to full brightness and turns on all the LEDs
![](/static/mb/lessons/night-light-0.png)
<br />
## 3. If the picture below is the BBC micro:bit, write the code that sets the screen brightness to 50% (128) and turns on all the LEDs.
![](/static/mb/lessons/night-light-1.png)
<br/>
## 4. If the picture below is the BBC micro:bit, write the code turns off all the LEDs.
![](/static/mb/lessons/night-light-2.png)