Just A Simple Colour thing.

menu nicklist {
  Colours!
  .on { set %thingy on | echo -a 4C3o4l3o4u3r4e3d 4S3c4r3i4p3t 4N3o4w 3O4n 3!4!3! }
  .off { unset %thingy | echo -a 4C3o4l3o4u3r4e3d 4S3c4r3i4p3t 4N3o4w 3O4f3f 4!3!4! }
}
on *:INPUT:*:{ 
  if ($left($1,1) != $chr(47)) && (%thingy == on) { 
    say $replace($1-,a,9A,b,6b,c,14C,d,4D,e,13e,f,7f,g,10G,h,13h,i,2I,j,12j,k,11k,l,3L,m,5m,n,8N,o,14o,p,7P,q,6q,r,11r,s,3S,t,10t,u,5U,v,2v,w,13w,x,7x,y,8y,z,3Z,:,4:,>,12>,<,2<,!,11!)
    halt 
  }
}