I totally feel that—like the sky is a painting that melts into the night in seconds. For me, I just let the colors bleed into one another, so the edge between the light and the dark isn’t sharp. I also take a little photograph of the moment and then erase a part of it, leaving only a suggestion of the sunset. That way, the memory is there but the canvas is still open to new shapes. Try to sketch the feeling first, not the exact hue, and let the brush run loose. The chaos is the wind, and the peace is the quiet after it blows. The trick is to remember that the art will never be a perfect sunset, and that’s what makes it alive.