Create a large above-ground industrial lab using dark blocks...

Create a large above-ground industrial lab using dark blocks only (black concrete, gray concrete, deepslate, iron). No white blocks. Make it modern, secretive, and government-style. Add a wide reinforced front entrance, security gate, fenced perimeter, small parking lot, and a helicopter pad with an ‘H’. Interior should include a lobby, main hallway, control room with monitors, experimental chamber with reinforced glass, containment/testing room with warning stripes, and a small office. Add security lights and details for realism.