My son has requested a Storm at Sea quilt and he is also enjoys scuba diving. I would like to make one for him that appears to change colors from one side or corner to the other of the quilt that would indicate the water color change from morning sun rise to evening sun set and also undulate like the water rolls on the ocean. Lighter to darker in other words and I am not quite sure how to accomplish the gradation from one color to another. I have always made really basic quilts so trying to change the feel from one point to the other is a real stretch for me and I am not at all sure how to approach it. Any suggestions/tutorials/visuals/book suggestions would be most appreciated. Thanks, Ann in TN