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

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+# 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 BBC micro:bit, 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 BBC micro:bit, 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 BBC micro:bit, write the code to turn off all the LEDs.
+
+```blocks
+led.setBrightness(0)
+```
+