sethead timeout

Can someone tell me why this wont work right? I want it only to let you change your head every 10 seconds just like with changing your name but only with changing your head.

NPC Code:

---

tokenize #c;

if (#t == 'sethead' && sec == 1){

sethead #t(1);

sec++;

}

while (sec > 1){

sleep 1.0;

sec++;



if (#t == "sethead"){

message please wait 10 seconds;

}

if (sec == 10){

sec = 1;

}

}

---