Roninro

I've been messing around trying to get a lens flare effect - made this sig, its ok (i think!) but has anyone got a clever idea how i could draw that semicircular flare you see in an eclipse as the sun moves out from behind the moon? Like a thin semicircle with a large flare halfway along it. (i'll try and think of a better way to explain it... sorry!)

I've been trying to make a flare image too, this banner is the best i've made so far.....