1 | A ProximitySensor routes to four TimeSensors, one per sliding stair. (see later for these nodes) |
2 | Each stair's timer routes to a PositionInterpolator that outputs varying positions side-to-side along the X axis. |
3 | The PositionInterpolator's positions are routed into translation fields for Transform nodes surrounding each stair. |
4 | By using different starting positions, the four stairs are made to slide back and forth in a pattern. |