Code:
on @*:text:*:#:{ 
  .timer $+ $cid $+ $chan $+ $nick $+ warn 1 1500 msg $nick Talk on $chan now or be kicked.
  .timer $+ $cid $+ $chan $+ $nick $+ kick 1 1800 kick $chan $nick Idled too long.
}
on @*:join:#:{
  .timer $+ $cid $+ $chan $+ $nick $+ warn 1 1500 msg $nick Talk on $chan now or be kicked.
  .timer $+ $cid $+ $chan $+ $nick $+ kick 1 1800 kick $chan $nick Idled too long.
}
on *:kick:#:{
  if ($timer($+($cid,$chan,$nick,warn))) { .timer $+ $cid $+ $chan $+ $nick $+ warn off }
  if ($timer($+($cid,$chan,$nick,kick))) { .timer $+ $cid $+ $chan $+ $nick $+ kick off }
}
on *:part:#:{
  if ($timer($+($cid,$chan,$nick,warn))) { .timer $+ $cid $+ $chan $+ $nick $+ warn off }
  if ($timer($+($cid,$chan,$nick,kick))) { .timer $+ $cid $+ $chan $+ $nick $+ kick off }
}

New username: hixxy