This painting is nearly finished, having gone through many changes, but I am not sure about the very last line. 

It began as some amorphous shapes on a background that was also made of amorphous shapes. Since it is quite large (4'x5') that was a lot of painting already. After looking at it a while, I added some geometric shapes in nearly but not quite primary colors. Some of those still show.  Still, it was not what I wanted. I added the grays - warm. light, medium, dark - and liked it better. Then I began to add lines and I think that I need one more but I can't decide exactly where to  place it and exactly how long it should be. Decisions, decisions.