diff --git a/js/render-fox.js b/js/render-fox.js
new file mode 100644
index 0000000..d92c378
--- /dev/null
+++ b/js/render-fox.js
@@ -0,0 +1,134 @@
+var renderFox = function (canvas, opts) {
+    var width = opts.canvas.width;
+    var height = opts.canvas.height;
+    var ctx = canvas.getContext('2d');
+
+    ctx.fillStyle = opts.canvas.color;
+    ctx.fillRect(0, 0, width, height);
+    renderEars(ctx, opts.ears);
+    renderHead(ctx, opts.head);
+    renderEyes(ctx, opts.eyes);
+    renderNose(ctx, opts.nose);
+    renderMouth(ctx, opts.mouth);
+};
+
+function renderHead(ctx, opts) {
+    ctx.save();
+    ctx.translate(ctx.canvas.width/2, ctx.canvas.height/2);
+    ctx.rotate(Math.PI / 4);
+    drawEllipseByCenter(ctx, 0, 0, opts.width, opts.height, opts.color, null, opts.kappa);
+    ctx.restore();
+    ctx.clip();
+    drawEllipseByCenter(ctx, ctx.canvas.width / 2, ctx.canvas.height, opts.maskWidth, opts.maskHeight, '#fff', '#fff', 0.5);
+}
+
+function renderEars(ctx, opts) {
+    var offset = {
+        x: ctx.canvas.width/2,
+        y: ctx.canvas.height/2
+    }
+    ctx.save();
+    ctx.translate(offset.x, offset.y);
+    ctx.rotate(-opts.left.angle);
+    drawEllipseByCenter(ctx, opts.left.x - offset.x, opts.left.y - offset.y, opts.left.width, opts.left.height, opts.color, null, opts.kappa);
+    ctx.restore();
+
+    ctx.save();
+    ctx.translate(offset.x, offset.y);
+    ctx.rotate(-opts.right.angle);
+    drawEllipseByCenter(ctx, opts.right.x - offset.x, opts.right.y - offset.y, opts.right.width, opts.right.height, opts.color, null, opts.kappa);
+    ctx.restore();
+}
+
+function renderEyes(ctx, opts) {
+    switch (opts.style) {
+      case "ellipse":
+        drawEllipseByCenter(ctx, opts.left.x, opts.left.y, opts.width, opts.height, "black", null, 0.5);
+        drawEllipseByCenter(ctx, opts.right.x, opts.right.y, opts.width, opts.height, "black", null, 0.5);
+        break;
+      case "smiley":
+        ctx.strokeStyle = "black";
+        ctx.beginPath();
+        ctx.moveTo(opts.left.x - opts.width, opts.left.y + opts.height);
+        ctx.bezierCurveTo(opts.left.x - opts.width, opts.left.y + opts.height, opts.left.x, opts.left.y, opts.left.x + opts.width, opts.left.y + opts.height);
+        ctx.lineWidth = 2;
+        ctx.stroke();
+        ctx.closePath();
+
+        ctx.beginPath();
+        ctx.moveTo(opts.right.x - opts.width, opts.right.y + opts.height);
+        ctx.bezierCurveTo(opts.right.x - opts.width, opts.right.y + opts.height, opts.right.x, opts.right.y, opts.right.x + opts.width, opts.right.y + opts.height);
+        ctx.lineWidth = 2;
+        ctx.stroke();
+        ctx.closePath();
+        break;
+      case "none":
+        break;
+    }
+}
+
+function renderNose(ctx, opts) {
+
+  ctx.strokeStyle = "black";
+  ctx.beginPath();
+  ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
+  ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2, opts.x, opts.y - opts.height, opts.x + opts.width/2, opts.y - opts.height/2);
+  ctx.bezierCurveTo(opts.x + opts.width/2, opts.y - opts.height/2, opts.x + opts.width/2, opts.y + opts.height/2, opts.x, opts.y + opts.height/2);
+  ctx.bezierCurveTo(opts.x, opts.y + opts.height/2, opts.x - opts.width/2, opts.y + opts.height/2, opts.x - opts.width/2, opts.y - opts.height/2);
+  ctx.fillStyle = "black";
+  ctx.fill();
+  ctx.stroke();
+}
+
+function renderMouth(ctx, opts) {
+  ctx.strokeStyle = "black";
+  ctx.lineWidth = 2;
+  ctx.beginPath();
+  switch (opts.style) {
+    case "smirk":
+      ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
+      ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2,
+        opts.x - opts.width/2, opts.y + opts.height/2,
+        opts.x + opts.width/2, opts.y
+      )
+      break;
+    case "cat":
+      ctx.moveTo(opts.x - opts.width/2, opts.y + opts.height/2);
+      ctx.lineTo(opts.x, opts.y - opts.height/2);
+      ctx.lineTo(opts.x + opts.width/2, opts.y + opts.height/2);
+      break;
+  }
+  ctx.stroke();
+}
+
+function drawEllipseByCenter(ctx, cx, cy, w, h, color, fillColor, kappa) {
+  drawEllipse(ctx, cx - w/2.0, cy - h/2.0, w, h, color, fillColor, kappa);
+}
+
+function drawEllipse(ctx, x, y, w, h, color, fillColor, kappa) {
+  var kappa = kappa || 0.3,
+      ox = (w / 2) * kappa, // control point offset horizontal
+      oy = (h / 2) * kappa, // control point offset vertical
+      xe = x + w,           // x-end
+      ye = y + h,           // y-end
+      xm = x + w / 2,       // x-middle
+      ym = y + h / 2;       // y-middle
+
+  if (color) {
+    ctx.strokeStyle = color;
+  }
+  ctx.beginPath();
+  ctx.moveTo(x, ym);
+  ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
+  ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
+  ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
+  ctx.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
+  var fillColor = fillColor || color;
+  if (fillColor) {
+    ctx.fillStyle = fillColor;
+    ctx.fill();
+  }
+  ctx.stroke();
+}
+
+module.exports = renderFox;
diff --git a/server.js b/server.js
index dc86b3b..58cf053 100644
--- a/server.js
+++ b/server.js
@@ -3,178 +3,15 @@ var express = require('express');
 var Canvas = require('canvas');
 
 var Fox = require('./js/fox.js');
-
-var renderFox = function (canvas, opts) {
-    var width = opts.canvas.width;
-    var height = opts.canvas.height;
-    var ctx = canvas.getContext('2d');
-
-    ctx.fillStyle = opts.canvas.color;
-    ctx.fillRect(0, 0, width, height);
-    // draw ears
-    renderEars(ctx, opts.ears);
-    // draw head
-    renderHead(ctx, opts.head);
-    // draw eyes
-    renderEyes(ctx, opts.eyes);
-    // draw cheeks
-    // draw eyes
-    // draw nose
-    renderNose(ctx, opts.nose);
-    // draw mouth
-    renderMouth(ctx, opts.mouth);
-};
-
-function renderHead(ctx, opts) {
-
-    ctx.save();
-    ctx.translate(ctx.canvas.width/2, ctx.canvas.height/2);
-    ctx.rotate(Math.PI / 4);
-    drawEllipseByCenter(ctx, 0, 0, opts.width, opts.height, opts.color, null, opts.kappa);
-    ctx.restore();
-    ctx.clip();
-    drawEllipseByCenter(ctx, ctx.canvas.width / 2, ctx.canvas.height, opts.maskWidth, opts.maskHeight, '#fff', '#fff', 0.5);
-}
-
-function renderEars(ctx, opts) {
-    var offset = {
-        x: ctx.canvas.width/2,
-        y: ctx.canvas.height/2
-    }
-    ctx.save();
-    ctx.translate(offset.x, offset.y);
-    ctx.rotate(-opts.left.angle);
-    drawEllipseByCenter(ctx, opts.left.x - offset.x, opts.left.y - offset.y, opts.left.width, opts.left.height, opts.color, null, opts.kappa);
-    ctx.restore();
-
-    ctx.save();
-    ctx.translate(offset.x, offset.y);
-    ctx.rotate(-opts.right.angle);
-    drawEllipseByCenter(ctx, opts.right.x - offset.x, opts.right.y - offset.y, opts.right.width, opts.right.height, opts.color, null, opts.kappa);
-    ctx.restore();
-}
-
-function renderEyes(ctx, opts) {
-    switch (opts.style) {
-      case "ellipse":
-        drawEllipseByCenter(ctx, opts.left.x, opts.left.y, opts.width, opts.height, "black", null, 0.5);
-        drawEllipseByCenter(ctx, opts.right.x, opts.right.y, opts.width, opts.height, "black", null, 0.5);
-        break;
-      case "smiley":
-        ctx.strokeStyle = "black";
-        ctx.beginPath();
-        ctx.moveTo(opts.left.x - opts.width, opts.left.y + opts.height);
-        ctx.bezierCurveTo(opts.left.x - opts.width, opts.left.y + opts.height, opts.left.x, opts.left.y, opts.left.x + opts.width, opts.left.y + opts.height);
-        ctx.lineWidth = 2;
-        ctx.stroke();
-        ctx.closePath();
-
-        ctx.beginPath();
-        ctx.moveTo(opts.right.x - opts.width, opts.right.y + opts.height);
-        ctx.bezierCurveTo(opts.right.x - opts.width, opts.right.y + opts.height, opts.right.x, opts.right.y, opts.right.x + opts.width, opts.right.y + opts.height);
-        ctx.lineWidth = 2;
-        ctx.stroke();
-        ctx.closePath();
-        break;
-      case "none":
-        break;
-    }
-}
-
-function renderNose(ctx, opts) {
-
-  ctx.strokeStyle = "black";
-  ctx.beginPath();
-  ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
-  ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2, opts.x, opts.y - opts.height, opts.x + opts.width/2, opts.y - opts.height/2);
-  ctx.bezierCurveTo(opts.x + opts.width/2, opts.y - opts.height/2, opts.x + opts.width/2, opts.y + opts.height/2, opts.x, opts.y + opts.height/2);
-  ctx.bezierCurveTo(opts.x, opts.y + opts.height/2, opts.x - opts.width/2, opts.y + opts.height/2, opts.x - opts.width/2, opts.y - opts.height/2);
-  ctx.fillStyle = "black";
-  ctx.fill();
-  ctx.stroke();
-}
-
-function renderMouth(ctx, opts) {
-  ctx.strokeStyle = "black";
-  ctx.lineWidth = 2;
-  ctx.beginPath();
-  switch (opts.style) {
-    case "smirk":
-      ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
-      ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2,
-        opts.x - opts.width/2, opts.y + opts.height/2,
-        opts.x + opts.width/2, opts.y
-      )
-      break;
-    case "cat":
-      ctx.moveTo(opts.x - opts.width/2, opts.y + opts.height/2);
-      ctx.lineTo(opts.x, opts.y - opts.height/2);
-      ctx.lineTo(opts.x + opts.width/2, opts.y + opts.height/2);
-      break;
-  }
-  ctx.stroke();
-}
-
-function drawEllipseByCenter(ctx, cx, cy, w, h, color, fillColor, kappa) {
-  console.log("ellipse coords", cx, cy, w, h);
-  drawEllipse(ctx, cx - w/2.0, cy - h/2.0, w, h, color, fillColor, kappa);
-}
-
-function drawEllipse(ctx, x, y, w, h, color, fillColor, kappa) {
-  var kappa = kappa || 0.3,
-      ox = (w / 2) * kappa, // control point offset horizontal
-      oy = (h / 2) * kappa, // control point offset vertical
-      xe = x + w,           // x-end
-      ye = y + h,           // y-end
-      xm = x + w / 2,       // x-middle
-      ym = y + h / 2;       // y-middle
-
-  if (color) {
-    ctx.strokeStyle = color;
-  }
-  ctx.beginPath();
-  ctx.moveTo(x, ym);
-  ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
-  ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
-  ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
-  ctx.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
-  var fillColor = fillColor || color;
-  if (fillColor) {
-    ctx.fillStyle = fillColor;
-    ctx.fill();
-  }
-  //ctx.closePath(); // not used correctly, see comments (use to close off open path)
-  ctx.stroke();
-}
-
-var circle = function(c){
-    var ctx= c.context || false;
-    var x=c.x || 500;
-    var y=c.y || x;
-    var r=c.r || 10;
-    var cr=ctx.canvas.width/2;
-    var lineWidth=c.lineWidth || 1;
-    ctx.beginPath();
-    ctx.arc(x,y,r,0,2*Math.PI);
-    ctx.lineWidth=lineWidth;
-
-    ctx.fillStyle="red";
-    ctx.fill();
-    ctx.stroke();
-
-
-    return true;
-};
+var renderFox = require('./js/render-fox.js');
 
 function writeFoxesToDisk (width, height, n=10) {
     var fileNames = [];
     for (var i = 0; i < n; i++) {
-        var Image = Canvas.Image;
         var canvas = new Canvas(width, height);
         var ctx = canvas.getContext('2d');
         var fox = Fox(width, height);
         renderFox(canvas, fox);
-        var img = new Buffer(canvas.toDataURL(), 'base64');
         var fileName = "fox" + Math.floor(Math.random() * 10000) + ".png";
         var filePath = __dirname + '/images/' + fileName;
 
@@ -192,7 +29,7 @@ var app = express();
 app.use(express.static(__dirname + '/images'));
 
 app.get('/', function(req, res) {
-    var fileNames = writeFoxesToDisk(300, 300, 30);
+    var fileNames = writeFoxesToDisk(200, 200, 30);
     var images = fileNames.map(fileName => '<img src="/' + fileName + '"/>');
     res.send(images.join(''));
 });