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docs/lessons/zoomer/activity.md

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+# zoomer block activity
+
+Measure the acceleration on the micro:bit in the "z" direction. 
+
+### ~avatar avatar
+
+### @video td/videos/zoomer-0
+
+### ~
+
+To create a new script, go to the [Create Code](/microbit/create-code) page and tap `New Project` under `Block Editor`.
+
+Welcome! This activity will teach how to measure the acceleration on the micro:bit in the "z" direction. Let's get started!
+
+We want to display the acceleration forever. In order to do so, we need a `forever` loop.
+
+```blocks
+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`.
+
+```blocks
+basic.forever(() => {
+    let az = input.acceleration(Dimension.Z)
+})
+```
+
+Show the value of `az` on the screen.
+
+```blocks
+basic.forever(() => {
+    let az = input.acceleration(Dimension.Z)
+    basic.showNumber(az)
+})
+```
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/microbit/lessons/zoomer/challenges)!
+
+### ~
+

docs/lessons/zoomer/challenges.md

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+# zoomer blocks challenges
+
+Coding challenges for zoomer.
+
+## Before we get started
+
+Complete the following [activity](/microbit/lessons/zoomer/activity) and your finished code should look like this:
+
+```blocks
+basic.forever(() => {
+    let az = input.acceleration(Dimension.Z)
+    basic.showNumber(az)
+})
+```
+### Challenge 1
+
+### @video td/videos/zoomer-2
+
+We'll modify the code to display the `x` acceleration if the `A` button is pressed. For that, we need to store `acceleration (x)` in a new variable `ax` and use a `button (A) is pressed` to detect if the button is pressed.
+
+```blocks
+basic.forever(() => {
+    let az = input.acceleration(Dimension.Z)
+    let ax = input.acceleration(Dimension.X)
+    if (input.buttonIsPressed(Button.A)) {
+        basic.showNumber(ax)
+    }
+    basic.showNumber(az)
+})
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 2
+
+Display the `y` acceleration when `B` is pressed by adding another `if` statement using `button (B) is pressed`.
+