Lifebar growth

I have a gui lifebar that shows up at the start of a game at 100%.
but I want it to grow to 100% from 0% at the start of the game…
does anyone know of a script piece that will do that ?

You can do something similar to this progress bar with GUITexture

The best way is swap out with the slider in NGUI or EZGUI for limited drawcalls. You can also move the UVs of a single texture to make it fill with a script like: