| Demonstration pattern (front image positions): middle-right -> center -> bottom-left -> bottom-center. Four nodes, with continuous straight segments. | |
| World nodes approximately: (-0.10,+0.10), (-0.10,0), (0,-0.10), (0,0). Node surface z about 0.017. | |
| Initial stick tip (-0.1023,0.1001,0.0695), above first node; middle-right already red at reset. | |
| Plan 0 descends onto first node then traces remaining three at z=0.017. | |