The Looper is actually a preset for the Interpolator available in the Automation panel to replace the Looper from the previous version of Duik.
Optical Toy, Phenakistiscope Disc with Cats and Donkey,
- Select the properties.
- Click the Looper button
All interpolations are deactivated to keep only the extrapolation, set to a Cycle loop foor the in and out extrapolation.