on *:TEXT:*Krypto*:#krypto: {
  if (%away. $+ $nick == on) { halt } {
    else set $+(%,away.,$nick) On
    /notice $nick <Text>
} }

This sets the variable to %nick.[TheirNick] but when they say "krypto" again it doesn't halt and notices them again. How can i make it so it only replys once?