cobble cobbles curves farmyard hard landscape hard landscaping hard surface pattern patterning patterns paving radiating stone stones texture textures abstract angled angles appearance background basic color colour concrete curved curving external footpath gray grey grooved grooves ground hard-surface hard-surfacing lined lines mottled mottling outdoors outside path pavement perspectives rough streaked streaks surface surfaced surfaces textured variations crazy-paving Designs detailed detailing distinctive gaps haphazard irregular level light mortar pavers shaped shapes size Sizes smooth stonework uneven striations blocks designed interconnected interlinked large limestone limestone-blocks hard Mineral rock