Trying to draw a GUI

I am try to draw a GUI in unity. It is there to do the same thing as GUI's do in RTS/building games - you click something like "build" and more options pop up. I can draw the static GUI without an issue, but when it comes to for instance, click "Build" and having a few labels like "Road" and "House" pop up, I cannot get that to run.

Basically, here is what it would be. This is all in C#.

void OnGUI() { if GUI.Button (new Rect (0,0,50,50), "Build") { Caller(Build); } }

void Caller(string Call) { if (Call == "Build") { GUI.Label(new Rect(100, 100, 50, 50), "Road")); GUI.Label(new Rect(150, 100, 50, 50), "House")); } }

This is a fairly close example of what I need, but I cannot get it to work. I might get it to work if I jammed them all in the OnGUI command, but I saw it was possible to draw them out of the OnGUI command in other unity answers questions. I was curious as to what I am missing. Thanks for all of your time.