abstract backdrop background canvas color colors colour colours paint painting series variation variations decoration decorative desktop diagonal pastel structure structures texture textures wallpaper shapes swirl art blue design encaustic green kaleidoscope pattern psychedelic art starfish symmetry abstracts backgrounds beige brown brush concept creation depressing distressed drab fill flaking flaky graphic grunge grungy image messy neutral New ochre old original peeling render style tiled tiles tired unique vector abstract background electric blue grass magenta plant purple space Terrestrial plant twig violet wood aqua burst circle circles circular dez pain fantasy futuristic geometric glassy hot infinity lines orange patterns radiate red round sci fi science spectacular squares techno time travel wow xymonau yellow