As you can see from the images on the left, The Seasons is a series of landscapes. Although originally created in oils, the pictures shown here were derived from scans of screenprints.
The underlying pattern, which is identical in each of the trees, was derived from a traditional Islamic design, to which was added a wave function. The 'landscape' was picked out by varying the colours used in each of the segments of the pattern. The tree structures were created by simply thickening some of the lines between the segments.