added multi dice tutorial (#1419)

* added multi dice tutorial

* Some dicey edits

docs/projects/multi-dice.md

@@ -0,0 +1,91 @@
+# Multi Dice
+
+## Introduction @unplugged
+
+![Multiple @boardname@ throwing a dice](/static/mb/projects/multi-dice.png)
+
+Build a multi-player dice game using the **radio**. The **radio** blocks let you send wireless messages between a @boardnam@ and another @boardname@.
+
+In this game, you shake to "throw the dice" and send the result to the other @boardname@. If you receive a result of a dice throw equal or greater than yours, you lose.
+
+## Dice game @fullscreen
+
+Let's start by rebuilding the **dice** game. If you are unsure about the details, try the **dice** tutorial again.
+
+```blocks
+input.onGesture(Gesture.Shake, function () {
+    basic.showNumber(Math.randomRange(1, 6))
+})
+```
+
+## Dice variable @fullscreen
+
+We need to store the result of the dice cast in a variable. A **variable** is like a place in the memory of the @boardname@ where you save information, like numbers.
+
+* Go to the **Variables** toolbox and click ``||Make a Variable||`` to create a new variable. We will call it **dice**. 
+* Add a ``||set dice to||`` block and drag the ``||pick random||`` into it.
+* Drag a ``||dice||`` from the **Variables** toolbox into the ``||basic:show number||`` block.
+
+```blocks
+let dice = 0
+input.onGesture(Gesture.Shake, function () {
+    dice = Math.randomRange(1, 6)
+    basic.showNumber(dice)
+})
+```
+
+## Send the dice @fullscreen
+
+Put in a ``||radio:send number||`` and a ``||dice||`` to send the value stored in the ``dice`` variable via radio.
+
+```blocks
+let dice = 0
+input.onGesture(Gesture.Shake, function () {
+    dice = Math.randomRange(1, 6)
+    basic.showNumber(dice)
+    radio.sendNumber(dice)
+})
+```
+
+## Receive the dice @fullscreen
+
+Go get an ``||radio:on received number||`` event block. This event runs when a radio message from another @boardname@ arrives. The ``receivedNumber`` value is the value of the dice in this game.
+
+```blocks
+radio.onReceivedNumber(function (receivedNumber) {
+})
+```
+
+## Check your cast @fullscreen
+
+Add a ``||logic:if||`` block to test if ``receivedNumber`` is greater or equal to ``dice``. 
+If is, you lost so display a sad face on the screen.
+
+```blocks
+let dice = 0;
+radio.onReceivedNumber(function (receivedNumber) {
+    if (receivedNumber >= dice) {
+        basic.showIcon(IconNames.Sad)
+    }
+})
+```
+
+## Test it! @fullscreen
+
+Try pressing **SHAKE** in the simulator and see that a second @boardname@ appears. You can play the game on both virtual boards.
+
+If you have more than one @boardname@, download your code onto each one and try playing the game with your friends!
+
+```blocks
+let dice = 0
+input.onGesture(Gesture.Shake, function () {
+    dice = Math.randomRange(1, 6)
+    basic.showNumber(dice)
+    radio.sendNumber(dice)
+})
+radio.onReceivedNumber(function (receivedNumber) {
+    if (receivedNumber >= dice) {
+        basic.showIcon(IconNames.Sad)
+    }
+})
+```

docs/projects/radio-games.md

@@ -6,6 +6,12 @@ Here are some cool projects that you can build with your @boardname@!
 
 ```codecard
 [{
+  "name": "Multi Dice",
+  "url": "/projects/multi-dice",
+  "description": "Compete with multiple dices",
+  "imageUrl": "/static/mb/projects/multi-dice.png",
+  "cardType": "tutorial"
+}, {
   "name": "Mood Radio",
   "url": "/projects/mood-radio",
   "description": "Send a mood message to your friends",