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+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="../../polymer/polymer.html">
+<link rel="import" href="../neon-animation-behavior.html">
+<link rel="import" href="../web-animations.html">
+
+<!--
+`<cascaded-animation>` applies an animation on an array of elements with a delay between each.
+the delay defaults to 50ms.
+
+Configuration:
+```
+{
+  name: 'cascaded-animation',
+  animation: <animation-name>,
+  nodes: <array-of-nodes>,
+  nodeDelay: <node-delay-in-ms>,
+  timing: <animation-timing>
+}
+```
+-->
+
+<script>
+
+  Polymer({
+
+    is: 'cascaded-animation',
+
+    behaviors: [
+      Polymer.NeonAnimationBehavior
+    ],
+
+    /**
+     * @param {{
+     *   animation: string,
+     *   nodes: !Array<!Element>,
+     *   nodeDelay: (number|undefined),
+     *   timing: (Object|undefined)
+     *  }} config
+     */
+    configure: function(config) {
+      this._animations = [];
+      var nodes = config.nodes;
+      var effects = [];
+      var nodeDelay = config.nodeDelay || 50;
+
+      config.timing = config.timing || {};
+      config.timing.delay = config.timing.delay || 0;
+
+      var oldDelay = config.timing.delay;
+      var abortedConfigure;
+      for (var node, index = 0; node = nodes[index]; index++) {
+        config.timing.delay += nodeDelay;
+        config.node = node;
+
+        var animation = document.createElement(config.animation);
+        if (animation.isNeonAnimation) {
+          var effect = animation.configure(config);
+
+          this._animations.push(animation);
+          effects.push(effect);
+        } else {
+          console.warn(this.is + ':', config.animation, 'not found!');
+          abortedConfigure = true;
+          break;
+        }
+      }
+      config.timing.delay = oldDelay;
+      config.node = null;
+      // if a bad animation was configured, abort config.
+      if (abortedConfigure) {
+        return;
+      }
+
+      this._effect = new GroupEffect(effects);
+      return this._effect;
+    },
+
+    complete: function() {
+      for (var animation, index = 0; animation = this._animations[index]; index++) {
+        animation.complete(animation.config);
+      }
+    }
+
+  });
+
+</script>