put lessons back for Michael

docs/lessons/digi-yoyo/quiz-answers.md

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+# digi yoyo quiz answers
+
+Answers for digi yoyo quiz. 
+
+This is the answer key for the [digi yoyo quiz](/lessons/digi-yoyo/quiz).
+
+## 1. Describe what a "while loop" does?
+
+<br/>
+
+A loop that repeats code while a condition is true.
+
+## 2. Write the code that will create a **variable** called `count` and set the variable to 0.
+
+![](/static/mb/lessons/counter-0.png)
+
+<br/>
+
+```blocks
+let count = 0
+```
+
+## 3. Create a `while loop` that will loop until the **variable** `count` equals 4.
+
+![](/static/mb/lessons/digi-yoyo-0.png)
+
+<br/>
+
+```blocks
+let count = 0
+while (count < 5) {
+    count = count + 1
+}
+```
+