Both natural and man-made patterns can be regular or irregular, organic or geometric, structural or decorative, positive or negative and repeating or random. Pattern in art is often based on the inspiration we get from observing the natural patterns that occur in nature. We can see these in the shape of a leaf and the branches of a tree, the structure of a crystal, the spiral of a shell, the symmetry of a snowflake and the camouflage and signalling patterns on animals, fish and insects. Pattern in art is used for both structural and decorative purposes. For example, an artist may plan the basic structure of an artwork by creating a compositional pattern of lines and shapes. Our selection of artworks illustrated below have been chosen because they all use pattern in an inspirational manner.