Here are all four studies together as a group. Notice how I turned them making an irregular shape instead of lining them all in a row. I wanted the colors to gradually change as in the actual leaves so at the top left is green-yellow, bottom left yellow-green, bottom right yellow-orange, top right, yellow green-red. I am thrilled with the outcome and hope to do more one hour studies because they were a lot of fun and no pressure. Doesn't everyone need that in their life!