abstract algorithm algorithms brain brains branches colourful Fractal fractals groe grow growth math mathematics nature sundfractals symbol symmetric tree trunk blue colored decay flotexture green joint metal multi old plug red rivet riveted row rust single texture violet welded yellow background garden Goiás grassbush landscape leaf leaves pan panoramic peace plant planting rain vegetation water yard brasil brazil Pirenópolis bean Broad Bean crop England english fabaceae farm field flowers Great Britain legume.Leguminosae May spring Sussex vegetable Vicia burst cloth color colors colour colours explode explosion fabric grunge light paint spin spiral splash splat splatter swirl turning twirl bare bark brown copse natural oak Quercus spinney windbreak winter bird's foot trefoil flower little lotus Lotus corniculatus small summer tiny trefoil wild cast casted course path route shadow sun timber track trees trunks wood woods aged chair door drawing entrance grungy isolated open page paper papier pencil retro sketch tattered torn vintage worn backdrop cardboard collage copyspace note notes rustic scrapbook scraps tag