Mine

on *:text:!world*:*:{
.notice $nick The current world is %world
}
on *text:!setworld*:#:{
if ($nick isop $chan) {
set %world $2-
.notice $nick The new world has been setted as: %world
}
else {
.notice $nick You cant set a new world, you have to be an Operator(Op // @).
}
}