Acrylic, Stained glass paint, sparkly paint on canvas.
I don’t think there was any particular aim at the begining, other than having the painting divided into two distinct areas.
Paint was dripped and smeared, with a lot of holding the canvas to make the paint run in different directions.
As the painting progressed, it settled into a (sun?) face above and a darker (sea?) face below. I don't want to say there are only two faces, there could be more.