cityscape distinctive Edinburgh hexagon hexagonal modern office tenements trees bw isolated isolated background lightbox tool tools work cone cones hexagons honeycomb honeycombs reflector reflectors safe safety traffic yellow allen assemble diy key metal open tighten white appearance ceiling ceiling lights Designs geometric intricate light lighting overlapping patterns polygon shade shadows shapes textures abstract angled angles background bricks color colorful colour colourful courtyard craftsmanship decorative detailed detailing fancy geometric shapes ground pavement pavers paving shaped stones stonework textured edge edges Nyberg red shape six blue black camp-fire danger fire flame pictogram security sign rail railway track transport