diff --git a/todo-src/index.html b/todo-src/index.html
index 89203ad..3249f8b 100644
--- a/todo-src/index.html
+++ b/todo-src/index.html
@@ -25,15 +25,29 @@ <h1 class="text-center">My little to do app!</h1>
         </div><!-- /input-group -->
         
       <h2>stuff i gotta do asap</h2>
-      
+      <!--Delete all completed tasks button-->
+      <div>
+        <button class="btn btn-info" type="button" ng-click="deleteCompleted()">
+          Delete Completed Tasks
+        </button>
+      </div>
       <ul class="list-group">
         <!-- http://www.w3schools.com/css/css_float.asp -->
-        <li class="list-group-item clearfix" ng-repeat="do in todos">
+        <li class="list-group-item clearfix" ng-repeat="do in todos" ng-class="{disabled: do.done}">
           
-          <span>{{do}}</span>
-          <button class="btn btn-danger pull-right" type="button" ng-click="deleteItem(do)">
-            <span class="glyphicon glyphicon-trash " aria-hidden="true"></span>
-          </button>
+           <span>{{do.name}}</span>
+           <span class="pull-right">
+
+            <!-- complete/uncomplete buttons -->
+            <button class="btn btn-success" ng-show="!do.done" ng-click="completeItem($index)">Done <span class="glyphicon glyphicon-ok"></span></button>
+            <button class="btn btn-success" ng-show="do.done" ng-click="uncompleteItem($index)">Undone <span class="glyphicon glyphicon-repeat"></span></button>
+
+           <button class="btn btn-danger" type="button" ng-click="deleteItem($index)">
+             <span class="glyphicon glyphicon-trash " aria-hidden="true"></span>
+           </button>
+
+           
+          </span>
 
         </li>
       </ul>
diff --git a/todo-src/script.js b/todo-src/script.js
index fe21743..d91a28d 100644
--- a/todo-src/script.js
+++ b/todo-src/script.js
@@ -3,22 +3,40 @@
 var myApp = angular.module('app', []);
 
 myApp.controller('MainCtrl', function ($scope){
-  $scope.todos = ["Learn Angular", "Learn node"];
+  $scope.todos = [{name: "Learn Angular", done:false}, {name: "Learn node", done:false}];
   $scope.newItem = "";
   
   $scope.addItem = function(){
     console.log("in add");
     if ($scope.newItem !== ""){
-      $scope.todos.push($scope.newItem);
+      var addItem = {name:$scope.newItem, done:false};
+      $scope.todos.push(addItem);
       $scope.newItem = "";
+
     }
   }
     
-  $scope.deleteItem = function(item){
+  $scope.deleteItem = function(index){
     console.log("in delete");
-    var index = $scope.todos.indexOf(item);
     $scope.todos.splice(index, 1);
   }
+
+  $scope.completeItem = function(index){
+    console.log("completed item");
+    $scope.todos[index].done = true;
+  }
+
+  $scope.uncompleteItem = function(index) {
+    console.log("uncompleted item");
+    $scope.todos[index].done = false;
+  }
+//iterates through todos from back to front, deleting
+//all entries that are tagged as finished
+  $scope.deleteCompleted = function() {
+    for (var i = $scope.todos.length - 1; i >= 0; i--) {
+      if($scope.todos[i].done) $scope.deleteItem(i);
+    };
+  }
     
   
 });
diff --git a/todo-src/style.css b/todo-src/style.css
index eb51b03..0458267 100644
--- a/todo-src/style.css
+++ b/todo-src/style.css
@@ -1,4 +1,4 @@
 /* Styles go here */
 body {
   background: green;
-}
+}
\ No newline at end of file