addFrontWheel(-10, 30);
addFrontWheel(10, 30);
addRearWheel(-10, 0);
addRearWheel(10, 0);
rightTouchSensor = new TouchSensor(20, 42, obstacles, this);
leftTouchSensor = new TouchSensor(-20, 42, obstacles, this);
addSensor(leftTouchSensor);
addSensor(rightTouchSensor);
rightRearTouchSensor = new TouchSensor(20, -20, obstacles,this);
leftRearTouchSensor = new TouchSensor(-20, -20, obstacles, this);
addSensor(rightRearTouchSensor);
addSensor(leftRearTouchSensor);
final int angle = 25;