Rockers, based on two points, “walk” down along a slash that maintains their pendulum rhythm.
The duration of the path depends of the length of the bar (15 inches / hour approximately)
8 hours, 31 days, 7 hours 9 minutes 1 second…
In the “threats” (see the pictures on the right), rockers support stones advancing along the bars.
The random movement of the stones above the heads of the walking people is threat for them.