Rapid fire Help

Hi. I am making a game where i heed to hold the space bar down and shoots lots of bullets at once and emit a particle. here is my script feel free to add on to it or leave any useful information. Thanks.(its a java script).

 if(Input.GetButtonDown("Jump"))
      {
          var bullit = Instantiate
          
          (bullitPrefab,GameObject.Find("spawnPoint").transform.position,Quaternion.identity);
          
          bullit.tag = "wormProjectile";
          
          bullit.rigidbody.AddForce(transform.forward * 2000);
      }