Hi I'm Michael and I've decided to make a robot but I need to ask you an important question. I got a great idea ok just imagine a barrier around a round robot and 2 wires going into the robot now lets say the right side of the barrier get hits then the right wire would go in further and would click a button that is connected to a device on the wire of a motor and this "thing's" main purpose is to slow down the motor but when the button is clicked the right tire would speed up and turn left, so I was wondering what do I need to do this and what that "thing" slowing down the motor would be?