Automation rule to forbid Due Date on weekends

[cquad]

Hello.

I'm trying to create an Automation rule that detects when a DueDate falls on Saturday/Sunday and automatically changes it to the previous Friday.

  I couldn't find exactly what I wanted, so I created a new customized rule and edited the "If" portion of the rule to: 

  If duedate > endOfWeek() AND duedate < startOfWeek() 

  However, now I don't know how to customize my Then statement. I couldn't find an option to add a JQL like statement, such as I did on the If. I could find the option to change the Due Date field, but it requires me to just pick a specific date on the calendar. 

  Does anyone know how I can achieve this?