Try this:
Code:
alias slowloop {
  ; $1 = line number
  ;
  var %delay.sec = [color:green]1[/color]
  ;
  var %c = $iif($1,$1,1), %cc = $lines([color:red]filename.txt[/color])
  var %read = $read([color:red]filename.txt[/color],%c)
  ;
  ; Do something here using %read
  echo -a Line %c $+ : %read
  ;
  inc %c
  if (%c <= %cc) .timerSL 1 %delay.sec slowloop %c
}


Your filename goes here
Change the delay time here

-genius_at_work