diff --git a/baumgen.html b/baumgen.html
index 0546338..8c4dce8 100644
--- a/baumgen.html
+++ b/baumgen.html
@@ -12,10 +12,13 @@
 
 <script type="text/javascript">
 document.addEventListener('DOMContentLoaded', function() {
-    console.log('ready');
-    var el = document.getElementById('download-svg');
-    console.log(el);
-    el.addEventListener('click', function() {
+    draw();
+
+    document.getElementById('redraw').addEventListener('click', function() {
+        draw();
+    });
+
+    document.getElementById('download-svg').addEventListener('click', function() {
         var svgdata = 'data:image/svg+xml;utf8,' + encodeURIComponent(paper.project.exportSVG({asString: true}));
         var a = document.createElement('a');
         a.download = 'baumgen.svg';
@@ -28,6 +31,7 @@ document.addEventListener('DOMContentLoaded', function() {
 
 </head>
 <body>
+    <button id="redraw">redraw</button>
     <button id="download-svg">download svg</button>
     <canvas id="canvas" resize></canvas>
 </body>
diff --git a/baumgen.js b/baumgen.js
index dc1a2fa..c9a16cf 100644
--- a/baumgen.js
+++ b/baumgen.js
@@ -223,7 +223,7 @@ class Branch {
 }
 
 
-window.onload = function() {
+function draw() {
     var canvas = document.getElementById('canvas');
     paper.setup(canvas);
 
@@ -234,5 +234,4 @@ window.onload = function() {
             var br = new Branch(gen_tree(new Point(50 + x*80, 150 + y*160)));
         }
     }
-
 }
