How to modify data across tables , trying to replicate macro functioality

I am converting an excel report having macro which modifies data/formula in daily worksheet based on values in Events table as below. Any idea how can i achieve this in DAX or ?

I have data in two tables as

Events table:

start dt, end date, span-days

Dailytable: start dt, end dt and idle-hours

data in daily table has uniqe dates where in events table it is not.

I want to calculate daily. idel-hours based on events.span-days value such that 

if  span-days>2 then

       loop unitl span-days starting with value of 2 say x

               dailytable.startdate+x.idle-hrs= .idle-hrs*60

  end

this would create an entry of say 60 in idle-hours for each row in daily table.

How can I achieve this in PowerBI?

Can I create a table using any script or how can access individual row ?