moving out outdated js docs

olddocs/js/lessons/accelerometer/challenges.md

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+# zoomer challenges
+
+The acceleration function.
+
+**Challenge 0**
+
+Great job! You have successfully completed the [zoomer tutorial](https://test.microbit.co.uk/td/lessons/zoomer/challenges) . You have created a script that measures the acceleration on the micro:bit in the "z" direction of a 3D world.
+
+```
+basic.forever(() => {
+    let millig = input.acceleration("z")
+    basic.showNumber(millig, 150)
+    basic.pause(100)
+})
+```
+
+**Challenge 1**
+
+Create a new variable called milliX that holds the acceleration in the "x" direction or the horizontal direction.
+
+```
+basic.forever(() => {
+    let millig1 = input.acceleration("z")
+    basic.showNumber(millig1, 150)
+    basic.pause(100)
+    let milliX = input.acceleration("x") // ***
+})
+```
+
+* Run the code to see if it works as expected.
+
+**Challenge 2**
+
+If Button `A` is pressed, we want to show the acceleration in the "x" direction by adding an if statement that checks to see if Button `A` is pressed and then calling the show number method passing in milliX as the number.
+
+```
+basic.forever(() => {
+    let millig2 = input.acceleration("z")
+    basic.showNumber(millig2, 150)
+    basic.pause(100)
+    let milliX1 = input.acceleration("x")
+    if (input.buttonIsPressed("A")) {
+        basic.showNumber(milliX1, 150) // ***
+    }
+})
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 3
+
+If Button `B` is pressed, program the micro:bit to display the acceleration in the "y" direction.
+
+You can do this by storing the acceleration in a variable: `var milliY := input->acceleration("y")`.
+
+Then add an `if` statement that checks if Button `B` is pressed: `if input-> button is pressed ("B") then`.
+
+Inside of the `if` statement, add `basic->show number(milliY, 150)`, which will display the acceleration in the "y" direction.
+