I had to look it up. Ok, you mean the multi-exposure flower image. It is about 7 or 8 shots on the same frame- so to speak. In-camera. You need a camera that has multi-exposure capability. Most of the high end cameras have this, about 10 or 11 per frame. Some only allow 3 or 5 per frame. My Pentax allows 999.
I did a simple, but slow diagonal movement at highest speed possible- like about 250 or higher to avoid blur (ha, ha). You can also do spirals and even create patterns where there was none.
The trick to these is to look for a subject with different colours or patterns that adjoin each other and are continous- such as found in garden flower beds. Not everyone likes these. But I have found you can win them over if you keep in mind the old adage, technique is secondary and composition and mood are primary.