select 2 points. simple explenation: reversed makes ovals of B&W and stripes of color. not reversed makes ovals of color and stripes of B&BW complex explenation: normal takes the current distance to the two points, adds them, and that is the hue. it subtracts point 1 by point 2 for shade. reversed subtracts with color and adds with shade to make the oppasite effect it now looks better
