PhantomJS code for scrolling to the end of a Twitter timeline

walk_through_twitter.js

var fs = require('fs'),
    page = new WebPage(),
    url = 'https://twitter.com/jmsdnns',
    stepOffset = 0,
    stepCounter = 0,
    full_path = "/Users/jmsdnns/Projects/ghst/img-tw";

page.open(url);

page.onLoadFinished = function(status) {

    if (status === 'success') {
        window.setInterval(function() {
            console.log("STEP " + stepCounter);
            // Render image
            var img_file_name = full_path + "/step" + stepCounter + ".png";
            page.render(img_file_name);

            console.log("    - step" + stepCounter + ".png");
            console.log("    - size: " + fs.size(img_file_name));
            console.log("    - step offset: " + stepOffset);
            if (fs.size(img_file_name) < 100000) {
                stepOffset = stepOffset - 1.5;
                console.log("    - offset adjust: " + stepOffset);
            }
            stepOffset = stepOffset + 1;
            stepCounter = stepCounter + 1;

            page.scrollPosition = {
                top: stepOffset * 500,
                left: 0
            };
        }, 2000);
    }
};