I made a mistake on this one.  This is an old rock wall and it continues in both directions for some length but in the sketch I didn’t give that appearance. What I should have done was draw some lines to outline the continuing rocks if nothing else.

Instead, what it appears to be is a stack of a few rocks rather than the line of rocks the wall makes.

Getting the color on the single leaf near the center was difficult because I didn’t have a red pencil. But using purple and orange came close to the deep maroon it actually was.