Code:
on *:text:!pause:#: {
  unset %uptimer2
  set -e %uptimer2 $ctime
}
on *:text:!unpause:#: {
  var %now $ctime
  set -e %uptimer. $+ $chan $calc($($+(%,uptimer.,$chan),2) + (%now - %uptimer2))
}


Mmmm maybe.