put lessons back for Michael

docs/lessons/magic-logo/challenges.md

@@ -0,0 +1,58 @@
+# magic logo challenges
+
+Coding challenges for magic logo.
+
+## Before we get started
+
+Complete the [magic logo](/lessons/magic-logo/activity) activity and your code will look like this:
+
+```blocks
+input.onLogoUp(() => {
+    basic.showLeds(`
+        . . # . .
+        . # # # .
+        # # # # #
+        . . # . .
+        . . # . .
+        `)
+})
+
+```
+
+
+### Challenge 1
+
+How about when the logo is down? We should display an arrow pointing downward!
+
+```blocks
+input.onLogoUp(() => {
+    basic.showLeds(`
+        . . # . .
+        . # # # .
+        # # # # #
+        . . # . .
+        . . # . .
+        `)
+})
+input.onLogoDown(() => {
+    basic.showLeds(`
+        . . # . .
+        . . # . .
+        # # # # #
+        . # # # .
+        . . # . .
+        `)
+})
+
+
+```
+
+
+### Challenge 2
+
+Use the `on screen up` event to show a spinning arrow when the screen is turned up.
+
+### Challenge 3
+
+Display another animation using the `on screen up` event.
+