moving out outdated js docs

olddocs/js/lessons/compare-machine/challenges.md

@@ -0,0 +1,79 @@
+# compare machine challenges
+
+These challenges allow you to set the value of a counter to 1 when button B is pressed. #docs
+
+### Challenge 0
+
+Welcome! This [guided tutorial](/lessons/comparison/tutorial) will assist you with using the comparison operator.
+
+```
+counter = 0
+input.onButtonPressed(Button.A, () => {
+    counter = counter + 1
+    if (counter == 10) {
+        counter = 1
+    }
+    basic.showNumber(counter, 150)
+})
+```
+
+### Challenge 1
+
+Now let's do something special when the micro:bit reaches the number `5`. Instead of just showing the number `5`, let's show the string `HALF WAY!`. Begin by setting an if statement to know when `counter = 5`.
+
+```
+counter = 0
+input.onButtonPressed(Button.A, () => {
+    counter = counter + 1
+    if (counter == 10) {
+        counter = 1
+    }
+    if (counter == 5) {
+    }
+    basic.showNumber(counter, 150)
+})
+```
+
+### Challenge 2
+
+Let's continue our plan of displaying `HALF WAY!` when `counter = 5`. To do so, add the following line of code inside the if statement.
+
+```
+counter = 0
+input.onButtonPressed(Button.A, () => {
+    counter = counter + 1
+    if (counter == 10) {
+        counter = 1
+    }
+    if (counter == 5) {
+        basic.showString("HALF WAY!", 150) // ***
+    }
+    basic.showNumber(counter, 150)
+})
+```
+
+* Run your code to see if it works as expected.
+
+### Challenge 3
+
+You may notice a problem right now. When `counter = 5`, the micro:bit will show both the message `HALF WAY!` and the number `5`. In order to fix this problem, let's take advantage of the `else` at the end of the if statement.
+
+```
+counter = 0
+input.onButtonPressed(Button.A, () => {
+    counter = counter + 1
+    if (counter == 10) {
+        counter = 1
+    }
+    if (counter == 5) {
+        basic.showString("HALF WAY!", 150)
+    } else {
+        basic.showNumber(counter, 150) // ***
+    }
+})
+```
+
+### Challenge 4
+
+When `counter = 8`, display the message `ALMOST THERE!` on the micro:bit. You will need to add an `else if` after the if statement of `counter = 5`.
+