Umm... Uh... Hi? So on to the thing- the ''pencil button'' is to make black color back... The magic wand for erasing... Plus sign to make it bigger(sorry for bad English, just try yourself...), and the minus is opposite... the thunder, lightning or whatever u call it is to erase all... if you press green flag again everything will be back to start... SORRY FOR ONLY RAINBOW COLORS AND THERE NO MORE... I TRIED MY BEST!
THAT WAS HARD PEOPLE