black car clogged dirty rubber rubbery sand sandy transport tread treads tyre tyres vehicle vulcanised vulcanized abstract cars fishmonk grip gripping groove grooves line lines lorries lorry New pattern patterned patterns stripe striped stripes stripy tire tires vehicles wheel wheels angled angles appearance caterpillar-track continuous-track continuous-tread-band mobility movement propulsion tank-tread track-plates vehicle-propulsion weight-distribution World-War-2-tank-track WWII-tank wear worn background blue bulp filament glass light Nyberg sky texture tractor boot foot hard oppression print stamp step violence violent walk beach coast feet people person sea