var bg_value = 255;
var fg_value = 0;
var birds_pos = -40;


function fade() {
	if(bg_value < 0 || fg_value > 255)
		return;
	document.getElementById('content').style.backgroundColor =
	"rgb(" + bg_value + "," + bg_value + "," + bg_value + ")";
	document.getElementById('content').style.color =
	"rgb(" + fg_value + "," + fg_value + "," + fg_value + ")";
	document.getElementById('birds').style.left =
	birds_pos + "px";
	birds_pos +=1;
	bg_value += 1;
	fg_value -= 1;
	window.name = birds_pos;
	window.setTimeout("fade()",900);
	}