First, lay out the map on paper and note every line of sight, every light, every patrol schedule. Mark the gaps where two patrols’ views don’t overlap – those are the only windows. Then pick the longest corridor that runs between those gaps; it gives you the most time to move without blinking. Use shadows for cover and keep your movements smooth, no sudden stops. If you hit a sensor, pause, wait for the next patrol shift, then continue. Once you reach the target, plant the device quickly, then backtrack the same path, using a different route if you see a new guard appears. Stay patient, plan each step, and only act when the timing is perfect.