short Ticker.js

news.css

#news { background: #666; color: #fff; padding: 4px 0; width: 100%; height: 30px; line-height: 30px; overflow: hidden; }
  #news .container { float: left; }
  #news .overflow { width: 900000px; }
  #news .item { padding: 0 20px; }

news.jade

#newsBlocks.FLC
  #news.FLC
    .overflow
      .container
        - each item in news_items
          span.item #{item}
          span.item ·

ticker.js

  var ticker = $('#news .container'),
      ticker_width = ticker.width();

  $('#news .overflow').append(ticker[0].cloneNode(true));

  function animateTicker() {
    $('#news .container').first().animate({
      marginLeft: ~ticker_width,
      duration: ticker_width/40*1000,
      easing: function (t) {
        return t;
      },
      complete: function() {
        $('#news .container').first().css({
          'margin-left': 0
        });
        animateTicker();
      }
    });
  }
  animateTicker();