diff --git a/.gitignore b/.gitignore
index 2ad031c..4a2b018 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,4 +12,5 @@ node_modules/
 .envrc
 server.js
 *.sublime-workspace
-chromedriver.log
\ No newline at end of file
+chromedriver.log
+.baseline
\ No newline at end of file
diff --git a/tests/results/chrome-23.0.1271.97-windows-vista.json b/tests/results/chrome-23.0.1271.97-windows-vista.json
new file mode 100644
index 0000000..8c8cf53
--- /dev/null
+++ b/tests/results/chrome-23.0.1271.97-windows-vista.json
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":98,"cases/background/linear-gradient.html":82.27},"date":"2012-12-28T16:48:04.248Z","version":"23.0.1271.97"}
\ No newline at end of file
diff --git a/tests/results/chrome-23.0.1271.97-windows-vista.json.baseline b/tests/results/chrome-23.0.1271.97-windows-vista.json.baseline
new file mode 100644
index 0000000..478cb85
--- /dev/null
+++ b/tests/results/chrome-23.0.1271.97-windows-vista.json.baseline
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":100,"cases/background/linear-gradient.html":82.27},"date":"2012-12-28T17:20:56.098Z","version":"23.0.1271.97"}
\ No newline at end of file
diff --git a/tests/results/chrome.json b/tests/results/chrome.json
new file mode 100644
index 0000000..01acad7
--- /dev/null
+++ b/tests/results/chrome.json
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":100,"cases/background/linear-gradient.html":82.27},"date":"2012-12-28T16:48:04.248Z","version":"23.0.1271.97"}
\ No newline at end of file
diff --git a/tests/results/firefox-12.0-windows-vista.json b/tests/results/firefox-12.0-windows-vista.json
new file mode 100644
index 0000000..ffe0de2
--- /dev/null
+++ b/tests/results/firefox-12.0-windows-vista.json
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":100,"cases/background/linear-gradient.html":92.64},"date":"2012-12-28T16:48:10.772Z","version":"12.0"}
\ No newline at end of file
diff --git a/tests/results/firefox.json b/tests/results/firefox.json
new file mode 100644
index 0000000..5b0f7bb
--- /dev/null
+++ b/tests/results/firefox.json
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":100,"cases/background/linear-gradient.html":85.64},"date":"2012-12-28T16:48:10.772Z","version":"12.0"}
\ No newline at end of file
diff --git a/tests/results/iexplorer-9-windows-vista.json b/tests/results/iexplorer-9-windows-vista.json
new file mode 100644
index 0000000..526cd67
--- /dev/null
+++ b/tests/results/iexplorer-9-windows-vista.json
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":100,"cases/background/linear-gradient.html":100},"date":"2012-12-28T16:48:04.855Z","version":"9"}
\ No newline at end of file
diff --git a/tests/results/iexplorer.json b/tests/results/iexplorer.json
new file mode 100644
index 0000000..526cd67
--- /dev/null
+++ b/tests/results/iexplorer.json
@@ -0,0 +1 @@
+{"tests":{"cases/background/encoded.html":100,"cases/background/linear-gradient.html":100},"date":"2012-12-28T16:48:04.855Z","version":"9"}
\ No newline at end of file
diff --git a/tests/selenium.js b/tests/selenium.js
index 5e9b5fe..b8e4074 100644
--- a/tests/selenium.js
+++ b/tests/selenium.js
@@ -1,154 +1,223 @@
-var webdriver = require("webdriver.js").webdriver,
-http = require("http"),
-url = require("url"),
-path = require("path"),
-base64_arraybuffer = require('base64-arraybuffer'),
-PNG = require('png-js'),
-fs = require("fs");
+(function(){
+  "use strict;"
+  var webdriver = require("webdriver.js").webdriver,
+  http = require("http"),
+  url = require("url"),
+  path = require("path"),
+  base64_arraybuffer = require('base64-arraybuffer'),
+  PNG = require('png-js'),
+  fs = require("fs");
 
+  function createServer(port) {
+    return http.createServer(function(request, response) {
+      var uri = url.parse(request.url).pathname,
+      filename = path.join(process.cwd(), "../" + uri);
 
-function createServer(port) {
-  return http.createServer(function(request, response) {
-    var uri = url.parse(request.url).pathname,
-    filename = path.join(process.cwd(), "../" + uri);
-
-    fs.exists(filename, function(exists) {
-      if(!exists) {
-        response.writeHead(404, {
-          "Content-Type": "text/plain"
-        });
-        response.write("404 Not Found\n");
-        response.end();
-        return;
-      }
-
-      if (fs.statSync(filename).isDirectory()) filename += '/index.html';
-
-      fs.readFile(filename, "binary", function(err, file) {
-        if(err) {
-          response.writeHead(500, {
+      fs.exists(filename, function(exists) {
+        if(!exists) {
+          response.writeHead(404, {
             "Content-Type": "text/plain"
           });
-          response.write(err + "\n");
+          response.write("404 Not Found\n");
           response.end();
           return;
         }
 
-        response.writeHead(200);
-        response.write(file, "binary");
-        response.end();
+        if (fs.statSync(filename).isDirectory()) filename += '/index.html';
+
+        fs.readFile(filename, "binary", function(err, file) {
+          if(err) {
+            response.writeHead(500, {
+              "Content-Type": "text/plain"
+            });
+            response.write(err + "\n");
+            response.end();
+            return;
+          }
+
+          response.writeHead(200);
+          response.write(file, "binary");
+          response.end();
+        });
       });
-    });
 
-  }).listen(port);
-}
+    }).listen(port);
+  }
 
-function walkDir(dir, done) {
-  var results = [];
-  fs.readdir(dir, function(err, list) {
-    if (err) return done(err);
-    var i = 0;
-    (function next() {
-      var file = list[i++];
-      if (!file) return done(null, results);
-      file = dir + '/' + file;
-      fs.stat(file, function(err, stat) {
-        if (stat && stat.isDirectory()) {
-          walkDir(file, function(err, res) {
-            results = results.concat(res);
+  function walkDir(dir, done) {
+    var results = [];
+    fs.readdir(dir, function(err, list) {
+      if (err) return done(err);
+      var i = 0;
+      (function next() {
+        var file = list[i++];
+        if (!file) return done(null, results);
+        file = dir + '/' + file;
+        fs.stat(file, function(err, stat) {
+          if (stat && stat.isDirectory()) {
+            walkDir(file, function(err, res) {
+              results = results.concat(res);
+              next();
+            });
+          } else {
+            results.push(file);
             next();
-          });
-        } else {
-          results.push(file);
-          next();
-        }
-      });
-    })();
-  });
-};
-
-function getPixelArray(base64, func) {
-  var arraybuffer = base64_arraybuffer.decode(base64);
-  (new PNG(arraybuffer)).decode(func);
-}
-
-
-function testPage(browser, url, done) {
-
-  browser.url(url)
-  .$(".html2canvas", 5000, function(){
-    this.execute(function(){
-      var canvas = $('.html2canvas')[0];
-      return canvas.toDataURL("image/png").substring(22);
-    },[], function(dataurl) {
-      getPixelArray(dataurl, function(h2cPixels) {
-        browser.screenshot(function(base64){
-          getPixelArray(base64, function(screenPixels) {
-            var len = h2cPixels.length, index = 0, diff = 0;
-            for (; index < len; index++) {
-              if (screenPixels[index] - h2cPixels[index] !== 0) {
-                diff++;
-              }
-            }
-            done(100 - (Math.round((diff/h2cPixels.length) * 10000) / 100));
-          });
-        })
-      });
+          }
+        });
+      })();
     });
-  });
-}
-
-function runBrowsers(pages){
-
-  var port = 5555,
-  stats = {},
-  browsers = ["chrome", "firefox", "internet explorer"],
-  browsersDone = 0,
-  server = createServer(port),
-  numPages = pages.length;
-
-  var browserDone = function() {
-    if (++browsersDone >= browsers.length) {
-      server.close();
-      console.log(stats);
-    }
   };
 
-  browsers.forEach(function(browserName){
-    var browser = new webdriver({
-      browser: browserName
-    }),
-    browserType;
+  function getPixelArray(base64, func) {
+    var arraybuffer = base64_arraybuffer.decode(base64);
+    (new PNG(arraybuffer)).decode(func);
+  }
 
-    browser.status(function(browserInfo){
-      browserType = [browserName, browser.version, browserInfo.os.name.replace(/\s+/g, "-").toLowerCase()].join("-");
-      var date = new Date(),
-      obj = {
-        tests: {},
-        date: date.toISOString()
+
+  function testPage(browser, url, done) {
+
+    browser.url(url)
+    .$(".html2canvas", 5000, function(){
+      this.execute(function(){
+        var canvas = $('.html2canvas')[0];
+        return canvas.toDataURL("image/png").substring(22);
+      },[], function(dataurl) {
+        getPixelArray(dataurl, function(h2cPixels) {
+          browser.screenshot(function(base64){
+            getPixelArray(base64, function(screenPixels) {
+              var len = h2cPixels.length, index = 0, diff = 0;
+              for (; index < len; index++) {
+                if (screenPixels[index] - h2cPixels[index] !== 0) {
+                  diff++;
+                }
+              }
+              done(100 - (Math.round((diff/h2cPixels.length) * 10000) / 100));
+            });
+          })
+        });
+      });
+    });
+  }
+
+  var writeResultFile = function(filename, json, append) {
+    fs.writeFile(filename + (append || ""), json);
+  };
+
+  var openResultFile = function(stats, browser) {
+    var tests = stats[browser].tests,
+    filename = "results/" + browser + ".json",
+    write = writeResultFile.bind(null, filename, JSON.stringify(stats[browser]));
+
+    fs.exists(filename, function(exists) {
+      if(exists) {
+        fs.readFile(filename, "binary", parseResultFile.bind(null, tests, browser, write));
+      } else {
+        write();
+      }
+    });
+  };
+
+  var setColor = function(color, text) {
+    return color + text.amount + "% " + text.test;
+  };
+
+  var parseResultFile = function(tests, browser, createResultFile, err, file) {
+    if (err) throw err;
+    var data = JSON.parse(file),
+    improved = [],
+    colors = {
+      red: "\x1b[1;31m",
+      green: "\x1b[0;32m"
+    },
+    regressed = [];
+
+    Object.keys(tests).forEach(function(test){
+      var testResult = tests[test],
+      dataResult = data.tests[test],
+      dataObject = {
+        amount: testResult - dataResult,
+        test: test
       };
-      stats[browserType] = obj;
-      stats[browserName] = obj;
-      processPage(0);
+
+      if (testResult > dataResult) {
+        improved.push(dataObject);
+      } else if (testResult < dataResult) {
+        regressed.push(dataObject);
+      }
+
     });
 
-    function processPage(index) {
-      var page = pages[index++];
-      testPage(browser, "http://localhost:" + port + "/tests/" + page + "?selenium", function(result) {
-        if (numPages > index) {
-          processPage(index);
-        } else {
-          browser.close(browserDone);
-        }
-        stats[browserType].tests[page] = result;
+    if (improved.length > 0 || regressed.length > 0) {
+      if (regressed.length === 0) {
+        createResultFile(".baseline");
+      }
+
+      console.log((regressed.length > 0) ? colors.red : colors.green, browser);
+
+      improved.map(setColor.bind(null, colors.green)).concat(regressed.map(setColor.bind(null, colors.red))).forEach(function(item) {
+        console.log(" *", item);
       });
     }
 
+  };
+
+  function handleResults(stats) {
+    Object.keys(stats).forEach(openResultFile.bind(null, stats));
+  }
+
+  function runBrowsers(pages){
+
+    var port = 5555,
+    stats = {},
+    browsers = ["chrome", "firefox", "internet explorer"],
+    browsersDone = 0,
+    server = createServer(port),
+    numPages = pages.length;
+
+    var browserDone = function() {
+      if (++browsersDone >= browsers.length) {
+        server.close();
+        handleResults(stats);
+      }
+    };
+
+    browsers.forEach(function(browserName){
+      var browser = new webdriver({
+        browser: browserName
+      }),
+      browserType;
+      browserName = browserName.replace("internet explorer", "iexplorer");
+      browser.status(function(browserInfo){
+        browserType = [browserName, browser.version, browserInfo.os.name.replace(/\s+/g, "-").toLowerCase()].join("-");
+        var date = new Date(),
+        obj = {
+          tests: {},
+          date: date.toISOString(),
+          version: browser.version
+        };
+        stats[browserType] = obj;
+        stats[browserName] = obj;
+        processPage(0);
+      });
+
+      function processPage(index) {
+        var page = pages[index++];
+        testPage(browser, "http://localhost:" + port + "/tests/" + page + "?selenium", function(result) {
+          if (numPages > index) {
+            processPage(index);
+          } else {
+            browser.close(browserDone);
+          }
+          stats[browserType].tests[page] = result;
+        });
+      }
+
+    });
+  }
+
+  walkDir("cases", function(err, results) {
+    if (err) throw err;
+    runBrowsers(results.slice(0, 2));
   });
-}
-
-walkDir("cases", function(err, results) {
-  if (err) throw err;
-  runBrowsers(results);
-});
 
+})();