This is just a little game some might enjoy. I'm going to give you a riddle and the first person to solve it has to, well you don't HAVE to, but it would be nice if the person who guessed correctly puts up their own riddle. Here goes. I am usually seen at night but sometimes during the day. I sometimes show you all of me, sometimes just half, sometimes just a quarter and other times you can't see me at all. What am I?