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docs/reference/js/lessons/rotation-animation/quiz-answers.md

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+# rotation animation quiz answers
+
+Learn how to create a rotating image with a while loop. #image #loop  #while #docs
+
+This is the answer key for the [rotation animation quiz](/microbit/lessons/rotation-animation/quiz).
+
+## 1. What is a "global variable"?
+
+Answers may vary. A global variable is a place where you can store data so that you can use it later in your code.
+
+## 2. Consider the following directions
+
+Write the code to create a **global variable** called `foo` that stores a boolean and initialize it to **false**.
+
+```
+rotating = true
+```
+
+## 3. Consider the following code
+
+```
+while (rotating) {
+}
+```
+
+Explain what this line of code does.
+
+<br/>
+
+It is a **while** loop that will be executed only if the **global variable** called `rotating` is **true**.
+
+## 4. Consider the following code
+
+```
+basic.showAnimation(`
+# . . . . . . # . . . . . . # . . . . .
+. # . . . . . # . . . . . # . . . . . .
+. . # . . . . # . . . . # . . # # # # #
+. . . # . . . # . . . # . . . . . . . .
+. . . . # . . # . . # . . . . . . . . .
+`, 400)
+```
+
+If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed. Explain why that particular area is shaded.
+
+![](/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
+