pendulum and clusters

I am thinking about starting a pendulum cycle and was reading ct’s article and noticed the cluster option. I understand the concept but I have a quick question. If I do one rep wait twenty seconds and do another and so on is each rep considered one set or do I do 6-8 per set. Thanks in advance to anyone who can help me.
Mikek

each cluster is a set.

6-8 per set is the way you do it. So for example, 6 sets of 4 reps would be:
1rep
30sec rest
1rep
30sec rest
1rep
30sec rest
1rep
30sec rest
This is one set of 4 clusters. Repeat 5 more times.

Thanks for answers fellas. appreciate it. mikek