var speed = 300;

function animate_red() {
    $('#red').animate({left:'0'}, speed, 'linear', animate_blue);
}

function animate_blue() {
    $('#blue').animate({left:'0'}, speed, 'linear', animate_green);
}

function animate_green() {
    $('#green').animate({left:'0'}, speed);
}

$(function() {
    var card = $('#red');
    if (card.length > 0) {
      animate_red();
    } else {
      card = $('#blue');
      if (card.length > 0) {
	animate_blue();
      } else {
	card = $('#green');
	if (card.length > 0) {
	  animate_green();
	}
      }
    }
  }
);