circuit clamps copper current electrical electricity ground power safety stake wires blue boat chain cleat hawser knot marina rope ship shipknot slipknot water background black cover plastic shine surface tarp tarpaulin texture wrinkle wrinkled wrinkles blanco caca clean dog dueño excremento feces garbage green limpieza limpio mascota owner park parque perro pet plaza poop responsable responsible señal sign urban urbano verde waste white angle angles appearance barbed-wire barbs barricade barrier caution cautionary-tape danger deteriorating double fence fencing gray grey light metal old plastic-tape protect protection protective razor-wire restraint rust rusting rusty secure security security-fence sharp silvery spirals strands tape textures twists warning wire