script that changes scenes when trigger is touched

simple script that changes scenes when trigger is touched by the unity default first person character controller, and how to use it

All is in documentation, if you put a little bit of effort, and paste here any script of yours I would fix it, otherwise can just send you to documentation.

Triggers

http://docs.unity3d.com/ScriptReference/Collider.OnTriggerEnter.html

http://unity3d.com/learn/tutorials/modules/beginner/physics/colliders-as-triggers

Change level
http://docs.unity3d.com/ScriptReference/Application.LoadLevel.html

This is Script will assign to trigger object.

void OnTriggerEnter(Collider Other)
{
if(Other.CompareTag(“Player”))
{
Application.LoadLevel(“YourScene”);
}
}