# night light quiz answers Answers to the night light quiz. This is the answer key for the [night light quiz](/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 @boardname@, write the code to set all the LEDs to full brightness and to turn on all the LEDs. <br /> ```blocks led.setBrightness(255) basic.showLeds(` # # # # # # # # # # # # # # # # # # # # # # # # # `) ``` ## 3. Consider the following image ![](/static/mb/lessons/night-light-1.png) If the rectangle above represents the @boardname@, write the code to set the screen brightness to 50% (128) and turns on all the LEDs. <br/> ```blocks led.setBrightness(128) basic.showLeds(` # # # # # # # # # # # # # # # # # # # # # # # # # `) ``` ## 4. Consider the following image ![](/static/mb/lessons/night-light-2.png) If the rectangle above represents the @boardname@, write the code to turn off all the LEDs. ```blocks led.setBrightness(0) ```