figured it out, thanks.
well I bumped into something weird tho...
/scanline {
  /verif 5 2b 3c
}
/verif {
  echo $1
  echo $2
  echo $3}
gives insufficient parameters on the 1st echo.
when you change the 5 into a5 it works, there has to be text
in the parameter or it bugs, can anyone explain why?
that doesn't really makes sence to me tho.