pxt-calliope/docs/lessons/night-light/quiz-answers.md

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.

1. Define the function "set brightness"

This function sets the brightness of the LED screen.

2. Consider the following image

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.

led.setBrightness(255)
basic.showLeds(`
    # # # # #
    # # # # #
    # # # # #
    # # # # #
    # # # # #
    `)

3. Consider the following image

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.

led.setBrightness(128)
basic.showLeds(`
    # # # # #
    # # # # #
    # # # # #
    # # # # #
    # # # # #
    `)

4. Consider the following image

If the rectangle above represents the BBC micro:bit, write the code to turn off all the LEDs.

led.setBrightness(0)