How do I make my GUI Box to work with no error?

I am trying to make a GUI Box that displays enemy health, but i am getting the error from unity, INVALID DECLARATION TYPE ‘VOID’. This script calls from a different script that has no errors. I will give both. Here is the script that doesn’t work:

#pragma strict

function OnGUI()
{
	var box = GUI.Box(Rect(20,20,200,30),"First Enemy Health: " + EnemyHealth.Health);
	return box;
	if (EnemyHealth.Health <= 0)
	{
		GUI.Box(Rect(20,20,200,30),"First Enemy Health: 0");
	}
}

function ApplyDammage(TheDammage :int)
{
	EnemyHealth.Health -= TheDammage;
}

Here is the other script that works(EnemyHealth):

#pragma strict

static var Health = 100;

function Update () {

	if (Health <= 0)
	{
		Destroy (gameObject);	
	}
}

function ApplyDammage(TheDammage :int)
{
	Health -= TheDammage;
}

Please help me fix the error: invalid declaration type ‘void’. Please help!

GUI.Box is a void it does not return a value or object.