Update 'make it communicate' lesson (#372)

docs/design-engineering/make-it-communicate.md

@@ -8,9 +8,9 @@ Design, build and program a robotic system that follows a path and communicates
 
 https://www.youtube.com/watch?v=6piMI1JPDQc
 
-*	Robotic systems are built from smaller, related subsystems. Look at the automobile system shown in the video. What subsystems can you see?
-*	What kinds of robots follow a path?
-*	What kind of system do you want to make?
+* Robotic systems are built from smaller, related subsystems. Look at the automobile system shown in the video. What subsystems can you see?
+* What kinds of robots follow a path?
+* What kind of system do you want to make?
 
 ### Brainstorm
 
@@ -21,7 +21,7 @@ Think about:
 * How can the robot sense where it is along the path?
 * How can the robot communicate its position?
  
- ![EV3 + LEGO Bricks](/static/lessons/make-it-communicate/hero.png)
+![EV3 + LEGO Bricks](/static/lessons/make-it-communicate/ev3-plus-parts.jpg)
 
 ## Construct 
 
@@ -29,25 +29,26 @@ Think about:
 
 You can start by tinkering with the LEGO elements in the picture and then build on.
 
-More building ideas: 
-* [EV3 Frames](https://le-www-live-s.legocdn.com/sc/media/files/support/mindstorms%20ev3/building-instructions/design%20engineering%20projects/ev3%20frames-5054ee378e624fb4cb31158d2fc8e5cf.pdf)
+More building ideas:
 
-* [Tracks](https://le-www-live-s.legocdn.com/sc/media/files/support/mindstorms%20ev3/building-instructions/design%20engineering%20projects/tracks-32d7554813af3f25cf5012d54a4bad2b.pdf)
+[![EV3 Frames](/static/lessons/make-it-communicate/ev3-frames.jpg)](https://le-www-live-s.legocdn.com/sc/media/files/support/mindstorms%20ev3/building-instructions/design%20engineering%20projects/ev3%20frames-5054ee378e624fb4cb31158d2fc8e5cf.pdf)
 
-* [Color Sensor 2](https://le-www-live-s.legocdn.com/sc/media/files/support/mindstorms%20ev3/building-instructions/design%20engineering%20projects/color%20sensor_v2-e7fd54b6fa3cdfe36f414c1d2510f9cb.pdf)
+[![Tracks](/static/lessons/make-it-communicate/ev3-tracks.jpg)](https://le-www-live-s.legocdn.com/sc/media/files/support/mindstorms%20ev3/building-instructions/design%20engineering%20projects/tracks-32d7554813af3f25cf5012d54a4bad2b.pdf)
+
+[![Color Sensor 2](/static/lessons/make-it-communicate/ev3-color-sensor2.jpg)](https://le-www-live-s.legocdn.com/sc/media/files/support/mindstorms%20ev3/building-instructions/design%20engineering%20projects/color%20sensor_v2-e7fd54b6fa3cdfe36f414c1d2510f9cb.pdf)
 
 
 Build a path for your robot to follow. You can use electrical tape on a floor, or marker on paper. You can use objects as milestones to indicate a path that can be detected by either the Touch Sensor, Color Sensor, or Ultrasonic Sensor. 
 
-## Program 
+### Program 
 
 Before you program, think about: 
  
-*	How will you program the robot to follow a path?
-*	How will you program the robot to communicate its position?
-*	Which programming blocks will you use?
+* How will you program the robot to follow a path?
+* How will you program the robot to communicate its position?
+* Which programming blocks will you use?
 
-### ~ hint
+### ~hint
 
 Explore the different Motor and Sensor blocks in the programming menu.
 
@@ -55,17 +56,25 @@ Explore the different Motor and Sensor blocks in the programming menu.
 
 ### Sample Solution 
 
-[Video: EV3 Track Rover](/static/lessons/make-it-communicate/trackrover.mp4)
+[![Video: EV3 Track Rover](/static/lessons/make-it-communicate/ev3-track-rover.jpg)](/static/lessons/make-it-communicate/trackrover.mp4)
 
 The Track Rover follows a path using the color sensor. It identifies two locations by color.
 
-[Building Instructions](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/ev3-dep/building%20instructions/track-rover-bi-6aadb1b053df0c58a0dea108b5ce0eea.pdf)
+Track Rover solution combines these building ideas:
+
+* EV3 frames
+* Tracks
+* Color sensor 2
+
+Two copies of the tracks are built: one for the right side and a mirror image for the left side.
+
+[![Track rover assembled](/static/lessons/make-it-communicate/ev3-track-rover2.jpg)](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/ev3-dep/building%20instructions/track-rover-bi-6aadb1b053df0c58a0dea108b5ce0eea.pdf)
 
 ### Sample Program Solution 
 
 This program works with the Track Rover. If you create a different robot, adjust the program to fit your solution. 
 
-#### Program summary: 
+Program summary: 
 
 * If the Color Sensor sees black, Motor B runs at -50 power and Motor C turns off.
 * If the Color Sensor sees white, Motor B turns off and Motor C runs at -50 power.
@@ -91,35 +100,10 @@ forever(function () {
         motors.stopAll()
         music.playSoundEffectUntilDone(sounds.colorsRed)
         motors.largeBC.run(-50)
-    } else {
-
     }
 })
 ```
 
-```blocks
-sensors.color3.onColorDetected(ColorSensorColor.Black, function () {
-    motors.largeB.run(-50)
-    motors.largeC.run(0)    
-})
-sensors.color3.onColorDetected(ColorSensorColor.White, function () {
-    motors.largeB.run(0)    
-    motors.largeC.run(-50)
-})
-sensors.color3.onColorDetected(ColorSensorColor.Green, function () {
-    motors.stopAll()
-    music.playSoundEffect(sounds.colorsGreen)
-    pause(1000)  
-    motors.largeBC.run(-50)
-})
-sensors.color3.onColorDetected(ColorSensorColor.Red, function () {
-    motors.stopAll()
-    music.playSoundEffect(sounds.colorsRed)
-    pause(1000)
-    motors.largeBC.run(-50)
-})
-```
-
 ### Download and test
 
 Click Download and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
@@ -128,37 +112,40 @@ Click Download and follow the instructions to get your code onto your EV3 Brick.
 
 ### Test and Analyze 
 
-As you work on your solution: 
+As you work on your solution:
+
 1. Describe one part of your design that worked especially well. 
 2. Describe one design change that you had to make. 
 3. What will you try next? 
 
 
 ### Review and Revise 
+
 Take a moment to reflect on your robot solution. 
 
-### Think about: 
-*	Can the robot’s movement be more accurate? 
-*	What are some ways that others have solved the problem?
+Think about:
+
+* Can the robot’s movement be more accurate? 
+* What are some ways that others have solved the problem?
 
 Describe two ways you could improve your robot.
 
 ## Continue 
 
 ### Personalize your project
-*	Add/remove LEGO elements to improve the way your robot moves. 
-*	Click on the JavaScript tab and experiment with changing the values in the code.
-*	Add a custom image or sounds by adding blocks from the Brick or Music menus.
+
+* Add/remove LEGO elements to improve the way your robot moves. 
+* Click on the JavaScript tab and experiment with changing the values in the code.
+* Add a custom image or sounds by adding blocks from the Brick or Music menus.
 
 ## Communicate 
 
-Here are some ideas: 
-*	Create a video of your project, especially your final presentation and your robot’s performance. 
-*	Explain some important features of your software program. 
-*	Produce a building guide for your model by taking a series of photographs as you deconstruct it. 
-*	Include an image of your program with comments. 
-*	Add a team photograph! 
+Here are some ideas:
+
+* Create a video of your project, especially your final presentation and your robot’s performance. 
+* Explain some important features of your software program. 
+* Produce a building guide for your model by taking a series of photographs as you deconstruct it. 
+* Include an image of your program with comments. 
+* Add a team photograph! 
 
 Congratulations! What will you design next?
-
-