How to make player can't move if npc event not end?

[ragexe]

prontera,150,166,4	script	Test	777,5,5,{
npctalk "Hey you"+getcharid(3);
sleep 5000;
unittalk getcharid(3), "Hey";
sleep 10000;
end;
}

I want to make player can't move if npc event not end

[ragexe]

bump