In Wiertz and Verbeek's kinetic, kaleidoscopic opus Keep on Turning (1974, 3 min, 16mm, sound) cubes convey, rotate and shift in tandem.
| Directing | Karin Wiertz | Director |
| Directing | Jacques Verbeek | Director |
| Visual Effects | Karin Wiertz | Animation Coordinator |
| Visual Effects | Jacques Verbeek | Animation Coordinator |
| Sound | Wim Langenhoff | Music |
| Sound | Bertus Borgers | Music |
| Sound | Bonki Bongaerts | Music |
