on *:TEXT:!checkz:#: {
  write -l1 totalscheck.txt $read(Blacknickstotal.txt, 1)
/var %c 2 | while ($read(Blacknickstotal.txt, %c) <= 21) && ($read(Blacknickstotal.txt, %c) > $read(totalscheck.txt, 1)) { write -l1 totalscheck.txt $read(Blacknickstotal.txt, %c) } | inc %c }


Blacknickstotal.txt :-
9
10
15
16
21
20

Only ever writes the number 10.
The purpose of the script is to first write line one of blacknickstotal.txt, then starting at line 2 of of the .txt file see if it's under 21, but larger than the number on line of totalscheck.txt