How to create an automation for tickets in Zoho Desk?

How to create an automation for tickets in Zoho Desk?

Hello,

I need to create an automation for tickets in Zoho Desk. I would like to have one field (integer) which will be updated every 100 days, for example, the field number is 0, and every 100 days it will be +1. How it's possible to do like this? 

Best regards,
Vladimir