In big font:
The sign should look like a much less ghetto version of this. Please use proper spelling. Make sure to complement this sign with your smuggest smile and best orange apparel. Recommended for those of you who will be sitting within earshot of a camera.
I would recommend another sign to the effect of "Hoosier Daddy?" in the event SU wins (you'd have to save it until after the game), but that isn't exactly accurate. Pass on that.