The following script can be schedule to auto close the standard changes/incidents after 5 days to auto close

var changeGR = new GlideRecord(‘change_request’);
changeGR.addQuery(‘type’, ‘Standard’);
changeGR.addQuery(‘state’, 0);
changeGR.query();
while(changeGR.next()) {
var dif = gs.calDateDiff(changeGR.sys_updated_on, gs.nowDateTime(), true);
gs.print(changeGR.number);
if(dif >= 5*86400){
         changeGR.state = 3;
         changeGR.comments = ‘Change Request automatically closed after 5 days in the Review state.’;
         changeGR.active = false;
         changeGR.update();
      }
}