background barrier brick modern mortar red security strength strong texture wall block cement decay grey rust space angles appearance backdrop backgrounds concrete constructed decorative display gray groove grooved grooves lines perspective perspectives secure solid surface surfaces textures variations variety walled well-built architecture blind build history pattern stone window appearances artificial artificial-lawn brickwork corner curved curves drive fence fencing flowers garden home house lavender lawn neat path paving pillars plants retaining-wall shaped shapes shrubs street suburban tidy blue cannon capital castle city cliff cloud clouds cloudy defence defences defense defenses Edinburgh flag flower fort fortress garrison green hill precipice rampart rock scotland sky soldier sun tree trees walls white