if reacting to whistle then checkwhere;
##checkwhere:
if $init_obj == 66170 then checkdraw;
##checkdraw:
$drawbridgehere = 65432;
if $drawbridgehere's linkstate == 0 then shoutgate else grumble;
##shoutgate:
msg 0,$actor,0,0,'shout',"From [$loc], you hear [$actor] shout 'Open the drawbridge!'",$actor;

##grumble:
msg 0,$actor,0,0,'shout',"From [$loc], you hear [$actor] shout 'Silence! The drawbridge is already open!'",$actor;