moving out outdated js docs

olddocs/js/lessons/on-shake/challenges.md

@@ -0,0 +1,83 @@
+# flipping bird challenges
+
+These challenges will allow you to create and display a flipping image of a bird when the micro:bit is shaken. #docs
+
+### Challenge 0
+
+### @video vimeo/134449611
+
+Greetings! This [guided tutorial](/lessons/flipping-bird/tutorial) will begin to show you how to flip a bird.
+
+```
+counter = 0
+input.onGesture(Gesture.Shake, () => {
+    counter = counter + 1
+    if (math.mod(counter, 2) == 1) {
+        images.createImage(`
+# # . # #
+. . # . .
+. . . . .
+. . . . .
+. . . . .
+`).showImage(0)
+    }
+})
+```
+
+### Challenge 1
+
+We handled the case of when `math->mod(counter,2) = 1`. We haven't done anything when the remainder is 0! Add an if statement to handle this case.
+
+```
+counter = 0
+input.onGesture(Gesture.Shake, () => {
+    counter = counter + 1
+    if (math.mod(counter, 2) == 1) {
+        images.createImage(`
+# # . # #
+. . # . .
+. . . . .
+. . . . .
+. . . . .
+`).showImage(0)
+    }
+    if (math.mod(counter, 2) == 0) {
+    }
+})
+```
+
+### Challenge 2
+
+Inside of that `if` statement you created in challenge 1, add `image->create image()->show image(0)` and display an upside down flying bird.
+
+```
+counter = 0
+input.onGesture(Gesture.Shake, () => {
+    counter = counter + 1
+    if (math.mod(counter, 2) == 1) {
+        images.createImage(`
+# # . # #
+. . # . .
+. . . . .
+. . . . .
+. . . . .
+`).showImage(0)
+    }
+    if (math.mod(counter, 2) == 0) {
+        images.createImage(`
+. . . . .
+. . . . .
+. . . . .
+. . # . .
+# # . # #
+`).showImage(0) // ***
+    }
+})
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 3
+
+Display a check mark and question mark instead of flipping birds. Or better yet, come up with your own pair of opposites to display!
+