Click the green button to begin the lesson. Click the red button to make it stop. The lesson has a quiz, you need to respond to the questions asked in the small space provided so that the lesson can continue. When you are done writing the correct answer press ENTER on your keyboard. The answer will be submitted and marked when pressing enter. At the end of the lesson learners are required to make use of the mouse to draw their own bridge on the sheet of paper.
I got some of my ideas from the tutorials hosted by Sibusiso from the Creative Coding for Teachers SLP and SL Smart Mind.