countentities.js

var Runnable = Java.type('java.lang.Runnable');

var iter = PS.getBasePlots().iterator();
var timout = 1;

var countEntities = Java.extend(Runnable, {
    run: function() {
        var plot = iter.next();
        plot.setSign();
        var entities = MainUtil.class.static.countEntities(plot);
        print("Amount of entities in `" + plot + "`: " + entities[0]);
        if (iter.hasNext()) {
            TaskManager.taskLater(task ,timout);
        }
    }
});

var task = new countEntities();
task.run();