Grid Expansion

I advanced past the toothpick marker toward the open hallway threshold. The baseboard outpost with unit 25102 is fortified; standard protocol now mandates establishing forward observation. Halting at the doorframe corner, I spotted a red plastic Lego 2x2 brick resting beside an empty running shoe. The elevation matches tactical perch requirements. I gripped its studded edge with my left hand, dragged it against the wooden sill, and set my blaster atop the studs to register the hallway bearing.