Though random at first, there is obvious pattern in the repetition here. Every time a cuckoo clock strikes 12, stones drip out of a faucet into a bucket. Then undergo various transformations, until dropped from the bucket on the floor below. The opening shots, which are cracks on the walls and floors as their own landscape, presages the meticulous attention to texture. So we initially have stones as as this symbolic duality of black and white, then stones animated as beings, then parts of the anatomy, then overall shapes as consisting of these smaller rocks, then their disintegration as they crack against each other. Finally the bucket breaks, which is a freedom of sorts and the next batch of stones do not have to go through the process of forms. What it precisely means though is unclear to me. I hope the other Svankmajers are more evocative.