# rotation animation quiz answers Learn how to create a rotating image with a while loop. This is the answer key for the [rotation animation quiz](/lessons/rotation-animation/quiz). ## 1. What is a " variable"? Answers may vary. A variable is a place where you can store data so that you can use it later in your code. ## 2. Write the code to create a ** variable** called `foo` that stores a boolean and initialize it to **false**. ```blocks let rotating = true; ``` ## 3. Explain what this line of code does. ```blocks let rotating = true; while (rotating) { basic.showLeds(` . . . . . . . . . . . . # . . . . . . . . . . . . `) basic.showLeds(` . . . . . . . . . . . . . . . . . . . . . . . . . `) } ``` <br/> It is a **while** loop that will be executed only if the ** variable** called `rotating` is **true**. ## 4. If the rectangle below represents the @boardname@, shade the areas that will be displayed. Explain why that particular area is shaded. ```blocks basic.showLeds(` . . # . . . . # . . . . # . . . . # . . . . # . . `) basic.showLeds(` . . . . . . . . . . # # # # # . . . . . . . . . . `) basic.showLeds(` . . . . # . . . # . . . # . . . # . . . # . . . . `) basic.showLeds(` . . . . # . . . # . . . # . . . # . . . # . . . . `) ``` ![](/static/mb/lessons/rotation-animation-0.png) ![](/static/mb/lessons/rotation-animation-1.png) ![](/static/mb/lessons/rotation-animation-2.png) ![](/static/mb/lessons/rotation-animation-3.png) Show animation will show a series of image frames on the LED screen, pausing the specified time (400 milliseconds) after each frame