How to make an healthbar

I wanna know how to make an healthbar in unity( DUH! ) so can you guys/girls help me with that?

Well, you could use a GUITexture and update it each time your health is reduced OR you could also use a scrollbar and reduce the height of it :)

Checkout this: http://unity3d.com/support/documentation/ScriptReference/GUI.HorizontalScrollbar.html

Just mofify the width of the rect :)

Cheers!