Forums Scripts & Popups where would i do this?

 on *:text:*:#: {
var %l = $left($1,1), %msg = $iif(%l == !,notice $nick,$iif(%l == @,msg $chan)), %r = $right($1,-1)
if (%r == clan) %msg clan message here
elseif (%r == stuff) %msg stuff message here
}