Find a Light Sensor in your kit and connect it to the bot on the limb you choose (long leg to the front, short leg to the back).
In your code, add a Light Sensor object to the workspace and change the PLACE to match the limb you chose in the previous step.
What happens when you approach your hand to the physical light sensor?
Now go to:
Servo Motor: http://conductivemusic.uk/2017/04/shine-7d/
Sound Waves: http://conductivemusic.uk/2017/04/shine-7e/