Zigbee commands

Hi all,
I have added some low voltage Zigbee bulbs to my HA (these). I see those bulbs in the UI and I can control them by selecting the colour and brightness. So far so good. I am just wandering what I use the Zigbee Clusters and Attributes for and how I could possibly use them to have a colour loop. Is there any documentation/tutoriuals out there?
Thanks in advance