Tutorial updates (#551)

* updated line following, added simulator step

* full screen

* resizing some images

docs/tutorials/line-following.md

@@ -104,8 +104,17 @@ forever(function () {
 })
 ```
 
-## Step 8
+## Step 8 @fullscreen
 
-Now, plug your EV3 Brick into the computer with the USB cable, and click the **Download** button at the bottom of your screen. Follow the directions to save your program to the brick.
+Use the EV3 simulator to try out your code. 
+
+![Brick with color sensors tracking a yellow line](/static/tutorials/line-following/line-following.gif)
+
+Move the slider under the Color Sensor to change the reflected light and check that motors 
+are moving as you would expect!
+
+## Step 9
+
+Plug your EV3 Brick into the computer with the USB cable, and click the **Download** button at the bottom of your screen. Follow the directions to save your program to the brick.
 
 Attach a Color Sensor to Port 3 of your brick, and attach your brick to a driving base with large motors attached to Ports B and C. See the instructions for building a _Driving Base with Color Sensor Down_. Test your program by positioning your robot to the right of a dark, thick line and then let it drive! 

docs/tutorials/make-an-animation.md

@@ -46,6 +46,12 @@ brick.showString("Press my button!", 1)
 
 ## Step 5
 
+Try out your code in the EV3 simulator!
+
+Press the ``Enter`` button and check that the image shows up as you expected.
+
+## Step 6
+
 Open the ``||brick:Brick||`` Toolbox drawer. Drag out a ``||brick:set status light||`` block onto the Workspace, and drop it into the ``||brick:on button||`` block after the ``||brick:show image||`` block.
 
 ```blocks
@@ -56,6 +62,6 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
 brick.showString("Press my button!", 1) 
 ```
 
-## Step 6
+## Step 7
 
-Now, plug your EV3 Brick into the computer with the USB cable, and click the **Download** button at the bottom of your screen. Follow the directions to save your program to the brick.
+Plug your EV3 Brick into the computer with the USB cable, and click the **Download** button at the bottom of your screen. Follow the directions to save your program to the brick.