A coffee painting composition

I was invited to teach coffee painting this summer. First I had to look up coffee painting, then I had to try it. I designed it so the front sail would be the lightest light against the darkest dark land. If you follow your eye around the painting you go from the sail to the top of the island and around to the mast and down to the skipper who is also close to the other third cross hair on the lower left. Coffee painting is different. The coffee doesn't stay where you put it. It slides to the edge of a wet area and makes a dark line. It is much like watercolor and you have to either paint over it frequently to darken it or make your coffee stronger. If you plan a painting, the very first thing you say to yourself is, " Why do I want to paint this?" Is it the color, the mood, the way it makes me feel, a reminder of something? Then design the painting. Where is the focal point going to go? Remember divide the sides by three and mark the cross hairs. It doesn't hurt to have two focal point for design but you must make one of them stronger, more detailed with brighter color.