fix re-draw button

chaostest/connected-lines.html

@@ -28,6 +28,8 @@ function get_svg() {
 window.onload = function() {
     paper.install(window);
     paper.setup(document.getElementById('canvas'));
+    var editor;
+
     rnd_params();
     draw();
 
@@ -40,11 +42,13 @@ window.onload = function() {
         a.click();
     });
 
-     document.getElementById('draw').addEventListener('click', function() {
+     document.getElementById('new').addEventListener('click', function() {
+         rnd_params();
+         editor.setValue(params);
          draw();
      });
 
-     var editor = new JSONEditor(document.getElementById('params'), {
+     editor = new JSONEditor(document.getElementById('params'), {
          no_additional_properties: true,
          disable_edit_json: true,
          disable_properties: true,
@@ -102,7 +106,7 @@ window.onload = function() {
 <canvas id="canvas"  style="width: 500px; height: 500px;" resize></canvas>
 <hr>
 <button id="download-svg">download svg</button>
-<button id="draw">draw</button>
+<button id="new">new</button>
 <br>
 <div id="params"></div>