Index the Green Tower lamp circle, mark every persistent red-star hazard after a failed attempt, then finish using the known-safe green lamps.
Find the blue circular arena near Green Tower at about 4020, 1870. Before starting, pick one doorway or the control desk as position 1 and number the yellow lamp stands around the circle in one direction. Bring spare lanterns or loose objects as markers. Test only one unknown lamp at a time. A green shape means that lamp is safe for the current layout; a red star ends the attempt, but its position stays dangerous on the next run. Place a marker beside that exact stand, restart, skip every marked red lamp, and add only one new unknown per attempt. Finish by activating the required safe green set. A fully green central column confirms success. If the remembered set does not finish, keep every hazard marker and test the remaining unknown positions instead of guessing.
Travel to approximately 4020, 1870 below Green Tower. Look for a low blue circular wall with several round openings. Inside are many yellow lamp stands, a tall black progress column, and a start/control point. A Green Tower laser makes the arena easier to spot at night.
Go to about 4020, 1870 and enter the blue circular enclosure. Confirm the yellow lamp stands and the tall black progress column before moving any loose objects.
You are inside one open circle with many yellow stands surrounding one central column.
Use the control desk, a distinctive doorway, or another fixed wall opening as position 1. Point to it, choose clockwise or counterclockwise, and number every stand in that direction. Never restart the numbering from where a player happens to be standing.
Every player can identify position 1 and the agreed travel direction without asking which lamp is next.
Place spare objects by the start landmark, not beside random lamps yet. If the team splits up, assign non-overlapping numbered arcs and use the same marker type for every confirmed red hazard.
Markers are ready, each scout owns a named arc, and no object covers a lamp button.
Start the attempt, call the lamp number, and activate only that unknown position. Do not let another player test at the same time. Record green as safe; if a red star appears, freeze so everyone can identify the failed stand.
The attempt produces one unambiguous result tied to one numbered lamp.
Put one spare object beside the red-star stand, outside its control. Say the position number aloud and add it to the hazard list. Do not move an earlier marker to save objects; each visible marker preserves one failed run.
The red position has both a physical marker and a recorded number before anyone presses start again.
Reset the attempt, return to position 1, and follow the same direction. Activate known-safe greens, walk past every marked red stand, then test one remaining unknown. Repeat until the required safe set is known.
No player touches a marked lamp, and each failed retry adds only one new hazard to the map.
On the final run, activate only the positions proven green for this world. Watch the central column as progress accumulates. If it stops short, leave all red markers in place and test one remaining unknown on the next run.
The selected lamps glow green and the central column fills without a red-star failure.
Wait for the central column to turn fully green and for the puzzle completion feedback. Collect the released Green Tower route piece before removing markers or leaving the arena.
The central column and completed lamp set glow green and the reward is available.
Use one caller/recorder and one tester/marker carrier. The tester names the lamp number before every press.
Split the circle into non-overlapping numbered arcs, but let one caller authorize each test so simultaneous presses never hide which lamp failed.