HELP! i want to write to look at the target and give a force to follow

How to write it right??

heatrocketaimingenemyplane.js

    static var targett : GameObject;
    var myTimer : float = 0.0;
    function OnTriggerStay (other : Collider) {

    if(other.gameObject.tag == "enemyplane")
        {
            aim.renderer.material.mainTexture = aimred;
              if(myTimer < 3){

            myTimer += Time.deltaTime;

                                }

        if(myTimer >= 3){
        lol = true;

        }

        if(lol && myTimer >= 3){

                aim.renderer.material.mainTexture = aimgreen;
                ***targett = other.gameObject;***
                print(targett);
            }
        }
    }

function OnTriggerExit (){
lol = false;
myTimer = 0.0;
aim.renderer.material.mainTexture = aimnormaltexture;
}

missile.js

function Update(){

transform.LookAt(***heatrocketaimingenemyplane.targett***);

}

Assets/Scripts/Weapons/NewBehaviourScript 2.js(4,17): BCE0023: No appropriate version of 'UnityEngine.Transform.LookAt' for the argument list '(UnityEngine.GameObject)' was found.

try changing this:

if(lol && myTimer >= 3){

            aim.renderer.material.mainTexture = aimgreen;
            ***targett = other.gameObject;***
            print(targett);
        }

to this:

if(lol == true && myTimer >= 3){

            aim.renderer.material.mainTexture = aimgreen;
            ***targett = other.gameObject;***
            print(targett);
        }

or: if(lol >= 3 && myTimer >= 3){

} whichever applies.

but my problem is that it cannot convert to trasform the collider, and i dont know how to fix

OH YEAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH I MADE IT!!!!!!!!!!!!!!!!!!!!!!!!!

targett = other.gameObject.transform;

I'm happy :)