I have made a sript which allows u to drive a tank. I used the wheelcolliders and the motortorque, however I have a problem: I don't Know how to rotate it. I only know that if a tank wans to turn left or right he has to turn forward the wheels on the left, while turns back the wheels on the right. I have a problem however: it doesn't turn on his pivot axes, but it goes a little forward and backward. Please, help

 var fwdDrive = Input.GetAxis("Vertical")*power;
 var h = Input.GetAxis("Horizontal")*maxSteer;

     for (var i = 0; i < 5; i++)

        wheelColliders[i].motorTorque = h+fwdDrive;



     for (i = 5; i < 10; i++)

        wheelColliders[i].motorTorque = -h+fwdDrive;

obviously it's in the fixedupdate function