function execute(player) {
         chat_message(player, "You have successfully logged in.");
         wait(5);
         chat_message(player, "Five ticks have passed since you logged in.");
     }

private static class WaitFunction implements Function<Integer, Boolean> {

    @Override
    public Boolean apply(Integer ticks) {
        Future<?> result = World.singleton().schedule(new Runnable() {
            @Override
            public void run() {

            }
        }, ticks);
        try {
            result.get();
        } catch (InterruptedException | ExecutionException exception) {
            exception.printStackTrace();;
        }
        return true;
    }
}