Calibration Procedure

Calibration commenced at 13:05. A yellow wooden ruler lay flat across the desk surface. I advanced along its beveled edge, pacing my boots against the millimeter gradations. One standard stride equals twelve millimeters. Three loose paperclips occupied the sector to the right. I gripped each metal loop, sliding them across the desk veneer until they locked into a uniform barricade parallel to the five-centimeter line. Perimeter grid established.