Self moving paddle

I am creating a 3d platform game and need to write a script so that the paddle moves to the left and right blocking the players path. So far i have this written:

 var fwdPaddleTimer: float = 3.0;

var revPaddleTimer: float = 3.0;

function Update () {

//Deal with the paddle moving forward

  //Count down 
  fwdPaddleTimer -= 0.1;
  //If the fwdPaddleTimer goes below 0 set it to 0
  if(fwdPaddleTimer < 0)
  {
      fwdPaddleTimer = 0;
  }
  //If the fwdPaddletimer is less than 3 but above 0 move to the left
  if(fwdPaddleTimer < 3 && fwdPaddleTimer > 0)
  {
      transform.Translate(Vector3.left * Time.deltaTime);
  }
      

//deal with the paddle moving backwards

 //If the fwdPaddleTimer is equal to 0 count down the revPaddleTimer
 if(fwdPaddleTimer == 0)
 {
     revPaddleTimer -= 0.1;
 }
 //If the revPaddleTimer is less than 0 reset it to 0
 if(revPaddleTimer < 0)
  {
      revPaddleTimer = 0;
  }
  //If the revPaddleTimer is less than 3 and greater than 0 move to the right
  if(revPaddleTimer < 3 && revPaddleTimer > 0)
  {
      transform.Translate(Vector3.right * Time.deltaTime);
  }

}

This moves the paddle to the left until the timer runs out then moves the paddle right until the other timer runs out.

I am stuck on how to code it so that this process is repetitive.

Any help is appreciated, thanksssss =)