exit;
if(figure!=1){SCRIPT "http://proteopedia.org/wiki/images/8/8b/4dkl-local-contact.png";}
spin on;
for(var i = 3;i > 0; --i){
 select on {bf0:A};
 set echo top center;
 echo antagonist;
 delay 5;
 select on displayed and not selected;
 echo receptor;
 delay 5;
}