diff --git a/bin/cli.js b/bin/cli.js
new file mode 100644
index 0000000..f02ad20
--- /dev/null
+++ b/bin/cli.js
@@ -0,0 +1,33 @@
+"use strict";
+
+module.exports = require("yargs")
+  .usage("Usage: ./tracking.js -f FILENAMES -c CLASSIFIERS [-d DIRECTORY]")
+  .alias("h", "help")
+  .option('c', {
+    alias: "classifiers",
+    array: true,
+    demand: true,
+    describe: "haarcascade classifier filename",
+    type: "string"
+  })
+  .option('f', {
+    alias: "filenames",
+    array: true,
+    describe: "one (or several) input filename(s)",
+    type: "string"
+  })
+  .option('d', {
+    alias: "directory",
+    describe: "directory containing classifiers and images",
+    type: "string"
+  })
+  .example("$ ./tracking.js -f myface.png -c faces.xml")
+  .example("$ ./tracking.js -d photos/summer_photos/ -c smiles.xml faces.xml")
+  .check(function (a) {
+    if (!((a.f || a.d) && !(a.f && a.d)))
+      throw new Error('Error:\n\tFilename or Directory must be set. Not both.');
+
+    return true;
+  })
+  .argv;
+
diff --git a/bin/tracking.js b/bin/tracking.js
new file mode 100755
index 0000000..15500b7
--- /dev/null
+++ b/bin/tracking.js
@@ -0,0 +1,31 @@
+#!/usr/bin/env node
+'use strict';
+
+const Canvas = require('canvas');
+const Image = Canvas.Image;
+const fs = require('fs');
+const path = require('path')
+const tracking = require('../index');
+const argv = require('./cli');
+
+var img = new Image();
+var canvas = new Canvas(200, 200);
+var ctx = canvas.getContext('2d');
+var tracker = new tracking.ObjectTracker(['face']);
+
+tracker.setStepSize(1.7);
+tracker.on('track', function (evt) {
+  evt.data.forEach(function (rect) {
+    console.log(rect);
+  });
+});
+
+argv.filenames.map(function (fname) {
+  img.src = fs.readFileSync(fname);
+  canvas.width = img.width;
+  canvas.height = img.height;
+  ctx.drawImage(img, 0, 0);
+
+  tracking.trackCanvas_(canvas, tracker);
+});
+
diff --git a/examples/assets/faces-found.png b/examples/assets/faces-found.png
new file mode 100644
index 0000000..dc48f20
Binary files /dev/null and b/examples/assets/faces-found.png differ
diff --git a/test/utils/sandbox.js b/index.js
similarity index 58%
rename from test/utils/sandbox.js
rename to index.js
index 7f5b039..e52eb2e 100644
--- a/test/utils/sandbox.js
+++ b/index.js
@@ -1,8 +1,11 @@
-'use strict';
-
+var buildDir = require('path').resolve(__dirname, './build/');
 var nodeunit = require('nodeunit');
 
-var context = nodeunit.utils.sandbox(['build/tracking.js', 'build/data/eye.js', 'build/data/face.js', 'build/data/mouth.js'], {
+var context = nodeunit.utils.sandbox([
+    buildDir + '/tracking.js',
+    buildDir + '/data/eye.js',
+    buildDir + '/data/face.js',
+    buildDir + '/data/mouth.js'], {
   Float32Array: Float32Array,
   Float64Array: Float64Array,
   Int16Array: Int16Array,
diff --git a/package.json b/package.json
index debffef..c79d6c6 100644
--- a/package.json
+++ b/package.json
@@ -18,11 +18,13 @@
     "type": "git",
     "url": "git@github.com:eduardolundgren/tracking.js.git"
   },
+  "main": "index.js",
   "scripts": {
     "test": "gulp test"
   },
   "license": "BSD",
   "devDependencies": {
+    "canvas": "^1.2.3",
     "gulp": "^3.8.1",
     "gulp-concat": "^2.2.0",
     "gulp-esformatter": "^0.5.0",
@@ -36,6 +38,7 @@
     "jshint-stylish": "^0.4.0",
     "nodeunit": "0.9.0",
     "png-js": "0.1.1",
-    "run-sequence": "^0.3.6"
+    "run-sequence": "^0.3.6",
+    "yargs": "^3.14.0"
   }
 }
diff --git a/test/Brief.js b/test/Brief.js
index 15265fc..51f532a 100644
--- a/test/Brief.js
+++ b/test/Brief.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var tracking = require('./utils/sandbox.js');
+var tracking = require('../index');
 
 module.exports = {
   setUp: function(done) {
diff --git a/test/ColorTracker.js b/test/ColorTracker.js
index 1daacca..4d8529f 100644
--- a/test/ColorTracker.js
+++ b/test/ColorTracker.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var tracking = require('./utils/sandbox.js');
+var tracking = require('../index');
 
 module.exports = {
   setUp: function(done) {
diff --git a/test/Fast.js b/test/Fast.js
index 103658b..9993152 100644
--- a/test/Fast.js
+++ b/test/Fast.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var tracking = require('./utils/sandbox.js');
+var tracking = require('../index');
 
 module.exports = {
   setUp: function(done) {
diff --git a/test/ObjectTracker.js b/test/ObjectTracker.js
index be99797..7425c7b 100644
--- a/test/ObjectTracker.js
+++ b/test/ObjectTracker.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var tracking = require('./utils/sandbox.js');
+var tracking = require('../index');
 
 module.exports = {
   setUp: function(done) {
diff --git a/test/perf/Brief.js b/test/perf/Brief.js
index 4a0662a..1def32f 100644
--- a/test/perf/Brief.js
+++ b/test/perf/Brief.js
@@ -1,5 +1,5 @@
 var PNG = require('png-js');
-var tracking = require('../utils/sandbox.js');
+var tracking = require('../../index');
 
 var corners1;
 var corners2;
diff --git a/test/perf/ColorTracker.js b/test/perf/ColorTracker.js
index d6ae296..e7c68fe 100644
--- a/test/perf/ColorTracker.js
+++ b/test/perf/ColorTracker.js
@@ -1,5 +1,5 @@
 var PNG = require('png-js');
-var tracking = require('../utils/sandbox.js');
+var tracking = require('../../index');
 
 var image;
 var imageHeight = 550;
diff --git a/test/perf/Fast.js b/test/perf/Fast.js
index dc857a7..e2dd2f1 100644
--- a/test/perf/Fast.js
+++ b/test/perf/Fast.js
@@ -1,5 +1,5 @@
 var PNG = require('png-js');
-var tracking = require('../utils/sandbox.js');
+var tracking = require('../../index');
 
 var image;
 var imageGray;
diff --git a/test/perf/ObjectTracker.js b/test/perf/ObjectTracker.js
index 2125d88..02e7bb8 100644
--- a/test/perf/ObjectTracker.js
+++ b/test/perf/ObjectTracker.js
@@ -1,5 +1,5 @@
 var PNG = require('png-js');
-var tracking = require('../utils/sandbox.js');
+var tracking = require('../../index');
 
 var image;
 var imageHeight = 600;