Insert 4 Loopers in auxiliary circuits.
Assign these 4 Loopers to groups 1, 2, 3 and 4.
Add a Korpus and tell it to take care of groups 1 to 4.
When Recording in Korpus, you can change groups with the < and > buttons to move to the next or previous group. When you reach the group 4, if you call the next one, you will go to 1 and so on.
You are in the situation of a circular Live Looping where the loops keep replacing each other.
Circular Live Looping