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docs/reference/js/lessons/zoomer/activity.md

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+# zoomer activity
+
+measure the acceleration on the BBC micro:bit in the "z" direction. #microbit #docs
+
+### ~avatar avatar
+
+### @video td/videos/zoomer-0
+
+Welcome! This tutorial will teach how to measure the acceleration on the micro:bit in the "z" direction. Let's get started!
+
+### ~
+
+To create a new script, go to the [Create Code](/microbit/create-code) page and tap *New Project* under **Touch Develop**.
+
+We want to display the acceleration forever. In order to do so, we need a `basic->forever` loop.
+
+```
+basic.forever(() => {
+})
+```
+
+Let's measure the acceleration and then store in it a variable `az`. The acceleration is measured in **milli-gravities**, so a value of `-1000` is equivalent to `-1g` or `-9.81m/s^2`.
+
+```
+basic.forever(() => {
+    let az = input.acceleration("z")
+})
+```
+
+Show the value of `az` on the screen.
+
+```
+basic.forever(() => {
+    let az_ = input.acceleration("z")
+    basic.showNumber(az_, 150)
+})
+```
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/microbit/lessons/zoomer/challenges)!
+
+### ~
+