added dice (#1196)

docs/projects/dice.md

@@ -0,0 +1,56 @@
+# Dice
+
+## Introduction
+
+![A microbit dice](/static/mb/projects/dice.png)
+
+Let's turn the @boardname@ into a dice! To do so, we need 3 pieces of code: detect a throw (shake),
+pick a random number, show the number.
+
+## Step 1 @fullscreen
+
+Place the ``||input:on shake||`` block. It runs code when you shake the @boardname@.
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+
+})
+```
+
+## Step 2 @fullscreen
+
+Place the ``||basic:show number||`` block in the ``||input:on shake||`` block to display a number.
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    basic.showNumber(0)
+})
+```
+
+## Step 3 @fullscreen
+
+Place the ``||Math:pick random||`` block in an ``||input:on shake||`` block to pick a random number.
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    basic.showNumber(Math.randomRange(0, 10))
+})
+```
+
+## Step 4 @fullscreen
+
+A typical dice shows values from `1` to `6`. So, in ``||Math:pick random||``, don't forget to choose the right minimum and maximum values!
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    basic.showNumber(Math.randomRange(1, 6))
+})
+```
+
+## Step 5
+
+Use the simulator to try out your code. Does it show the number you expected?
+
+## Step 6
+
+If you have a @boardname@ connected, click ``|Download|`` and transfer your code to the @boardname@!