Christmas carol in code

Write a Christmas carol in code. Here is my entry

<?php

class Night {

	function __construct($type){

	}
}

class All {

	public $calm = false;
	public $brightness = "#000000";

	function __construct(){

	}

	public function adjustCalmness(){
		$this->calm = true;
	}

	public function adjustBrightness(){
		$this->brightness = "#ffffff";
	}
}

$night1 = new Night("silent");
$night2 = new Night("holy");

$all = new All();
$all->adjustCalmness();
$all->adjustBrightness();

$yon_virgin = 1.2;
$mother = 1.3;
$child = 1.4;

round($yon_virgin);
round($mother);
round($child);

// TODO: Holy infant, tender and mild

function heavenly_peace(){
	sleep(100);
}

heavenly_peace();