barbed wire barbs barrier danger double fence fencing gray grey metal restraint sharp silvery spirals strands twists wire bolted crash-barrier curve curved grass grassed protection protective safe safety secure secured security solid strength strong trees barricade razor wire security fence barbed black silhouettes sky spiked spikes three strands twisted abstract art artwork background blended checkered checks color colored colorful colors colour coloured colourful colours connected connections dark decorative design details green interconnected interlinked intermeshed layers light linear lined lines metal-fencing modern-art multicolored multicoloured paint painted painting perspectives purple shaped shapes style texture textured textures vibrant wallpaper appearance boundary coloration divide divided dividing joined maroon-sheetmetal-fence plants ribbed ribs shadows sheetmetal sunlight sunshine weeds barbed-tape barbed-wire injury razor-sharp razor-wire security-fence warning