Add 'What Animal Am I' tutorial (#417)

docs/tutorials/what-animal-am-i.md

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+# What Animal Am I?
+
+## Introduction @fullscreen
+
+Create different animal effects with your LEGO Mindstorms Brick.
+
+![Guess the what the animal is](/static/tutorials/what-animal-am-i/guess-animal.gif)
+
+## Step 1
+
+Open the ``||brick:Brick||`` Toolbox drawer. Drag out a ``||brick:show string||`` block from the **Screen** section onto the Workspace, and drop it into the ``||loops:on start||`` block. You should hear and see the block click into place.
+
+```block
+brick.showString("Hello world", 1)
+```
+
+## Step 2
+
+In the ``||brick:show string||`` block, type the text ``"Guess what animal?"`` to replace ``"Hello world"``.
+
+```block
+brick.showString("Guess what animal?", 1)
+```
+
+## Step 3
+
+Open the ``||brick:Brick||`` Toolbox drawer. From the **Buttons** section, drag out an ``||brick:on button||`` block and put it anywhere in the Workspace.
+
+```block
+brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () { 
+     
+}) 
+brick.showString("Guess what animal?", 1)
+```
+
+## Step 4
+
+In the ``||brick:on button||`` block, use the drop-down menu to select the ``left`` button. 
+ 
+![Dropdown with button choices](/static/tutorials/what-animal-am-i/on-button-dropdown.png)
+
+```block
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () { 
+     
+}) 
+brick.showString("Guess what animal?", 1) 
+```
+
+## Step 5
+
+Open the ``||brick:Brick||`` Toolbox drawer. In the **Buttons** section, drag out **3** more ``||brick:on button||`` blocks onto the Workspace. Using the drop-down menu, select the ``right``, ``up``, and ``down`` buttons for these 3 blocks.
+
+```block
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () { 
+     
+}) 
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () { 
+     
+}) 
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () { 
+     
+}) 
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () { 
+     
+}) 
+brick.showString("Guess what animal?", 1) 
+```
+
+## Step 6
+
+Open the ``||brick:Brick||`` Toolbox drawer. Drag out **4** ``||brick:show image||`` blocks onto the Workspace, and drop one of them into each of the ``||brick:on button||`` blocks.
+
+```block
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () { 
+    brick.showImage(images.expressionsBigSmile) 
+}) 
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () { 
+    brick.showImage(images.expressionsBigSmile) 
+}) 
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () { 
+    brick.showImage(images.expressionsBigSmile) 
+}) 
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () { 
+    brick.showImage(images.expressionsBigSmile) 
+}) 
+brick.showString("Guess what animal?", 0)
+```
+
+## Step 7
+
+In the ``||brick:show image||`` blocks, use the drop-down menu to select a different image to show for each block. 
+ 
+![Dropdown with image selection](/static/tutorials/what-animal-am-i/show-image-dropdown.png)
+
+```block
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.expressionsMouth2shut)
+})
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.expressionsMouth1open)
+})
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.objectsBoom)
+})
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.objectsPirate)
+})
+brick.showString("Guess what animal?", 0)
+```
+
+## Step 8
+
+Open the ``||music:Music||`` Toolbox drawer. Drag out **4** ``||music:play sound effect||`` blocks onto the Workspace, and drop one of them into each of the ``||brick:on button||`` blocks, just after the ``||brick:show image||`` block.
+
+```block
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.expressionsMouth2shut)
+    music.playSoundEffect(sounds.animalsCatPurr)
+}) 
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.expressionsMouth1open)
+    music.playSoundEffect(sounds.animalsCatPurr)
+})
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.objectsBoom)
+    music.playSoundEffect(sounds.animalsCatPurr)
+})
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.objectsPirate)
+    music.playSoundEffect(sounds.animalsCatPurr)
+})
+brick.showString("Guess what animal?", 0)
+```
+
+## Step 9
+
+In each ``||music:play sound effect||`` block, use the drop-down menu to select a different animal sound to play.
+ 
+![Dropdown with sound effect selection](/static/tutorials/what-animal-am-i/play-sound-effect-dropdown.png)
+
+```block
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.expressionsMouth2shut)
+    music.playSoundEffect(sounds.animalsCatPurr)
+})
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.expressionsMouth1open)
+    music.playSoundEffect(sounds.animalsDogBark1)
+})
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.objectsBoom)
+    music.playSoundEffect(sounds.animalsElephantCall)
+})
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.objectsPirate)
+    music.playSoundEffect(sounds.animalsSnakeHiss)
+})
+brick.showString("Guess what animal?", 0)
+```
+
+## Step 10
+
+Now, let’s download our program to the brick. Plug your EV3 brick into the computer with the USB cable, and click the blue **Download** button in the bottom left of your screen. Follow the directions to save your program to the brick. Test your program with a friend by pressing the right, left, up, and down buttons on your Brick. Have your friend guess what animal it is!