Focus on this artwork and analyze the Composition.
The painting was made using acrylic Liquitex on a white cotton duck canvas, with no underdrawing.  Hockney uses a limited palette – cobalt blue, ultramarine blue, raw sienna, burnt sienna, raw umber, Hooker's green, Naples yellow and titanium white – applied either mixed together or as tints.  Apart from the splash, the painting was finished very evenly and flat with a paint roller, in two or three layers, with the few details – tree, grass, chair, reflections – overpainted.  The central splash was heavily worked over a period of about two weeks using a variety of small brushes.  A wide border and central narrow stripe at the pool's edge are left unpainted.  The border creates an effect like a Polaroid photograph.  The painting has been viewed as a critical link in Hockney's ruminations on time between his earlier Picture Emphasising Stillness and his later "joiners" portraits, created by collaging many photographs of the same subject taken over a period of hours.
paint roller cotton duck raw sienna cobalt blue canvas Hooker's green ultramarine blue Polaroid collaging titanium white burnt sienna overpainted Naples yellow underdrawing Liquitex raw umber