The arena has a large object which the robot should track (keep a constant distance from). You define the robot's motor speeds: use integers as before. You can also set how fast the object moves. Note the object eats the robot if it catches it!
Press D to define the motor speeds: tab to the next speed; O to set the object speed.
Use S to start/stop the robot, P to reposition it and W to toggle Reverse Left Motor.
Use I, J, K, M to move the robot Up,Left, Right or Down.
Define the speeds so the robot steers towards the object if it just sees it, but reverses if the object is too close. Does it work ok?
Try with wider beams.
Set the object speed to say 10. Does the robot stay safe?