abstract bright summer background with the word summer in white in the center, half circles on one side and small squares on the

background wallpaper vector yellow summer bright light texture illustration sun design abstract sunshine orange graphic template banner line sunny color burst art modern backdrop pop cartoon sunset book sunbeam halftone sunburst beam holiday layout frame poster style dot explosion flow presentation pattern gradient element vintage sunrise round retro sunlight youtube cover word white center half circles one side small squares other background suitable for cover vector