Unit script giving me hell

Hello, I got a script from a tutorial, and a unit is supposed to spawn on Start.
It is saying I need an instance of type Unit to access the Create function:

var GO : GameObject;

function Start() {
	Unit.Create(GO, Vector3.zero, Quaternion.identity, 0);
}

public class Unit {
	function Create(OBJ : GameObject, pos : Vector3, rot : Quaternion, ID : int) {
		GameObject.Instantiate(OBJ, pos, rot);
	}
	
	function Destroy (ID : int) {
	 
	}
}

It means you need to create an instance of the Unit class.

var unit = new Unit();