modify /PPP active remove

Rather than disconnecting all active PPP clients in one action, I would like to modify my daily script below to disconnect blocks of 50 but don’t want the reconnected to be added to disconnect list?

/ppp active remove

(1) check client uptime (2) if greater than 1 hour (3) select 50 and remove (4) wait 15 seconds repeat 1-4

Any advice is most welcome