abstract antislip background bright bump-map diamond-patterned diamond-plate diamond-sheet diamondplate grid industrial industry light metal pattern patterned patterns paving reflection reflections reflective sheet-metal shiny silvery surface surfaced surfaces texture textured textures walkway construction diamonds metallic non-skid oxidation oxide paint painted rust rusted rusting rusty urban weathered worn advice black danger handrails high inside interior non-slip rails ribbed sign stairs steel steps strong sturdy warning yellow appearance arched arches architectural art-glass artistic artistry clear color coloration colored colorful colors colour coloured colourful colours contrast craftsmanship dark decorative design designed Designs diamond-shaped diamond-shapes frame framed glass green lead lighting lines perspectives rippled shade shades-of-colour shaped shapes stained-glass window angled angles cage caged contain container diamond edge edged edges gaps geometric geometrical grill grille lined plastic rectangular triangles triangular flower flowers communicate communication message