What do all those little, multi-shaded, green squares signify? I know they are related to rep level - but there seems to be no logical sense to the way they are arranged. They come and go at will, it seems. Sometimes they are yellow. Most of the time they are light and/or darker green. I can see no logical relationship between the number or shading of the green squares and my rep count - or anyone's rep count, for that matter. What do you have to do to get a green square? They seem to come in groups of five. What does that mean? I can't find an explanation of them anywhere. Just askin' . . . .