AngularJS Basic radio button

HTML

<script src="http://code.angularjs.org/angular-1.0.0.js"></script>
<div ng-app="myApp">
    <div ng-controller="myController">

    </div>
</div>

CSS

.selected {
  background: green;
}

JavaScript

var app = angular.module('myApp', []);
app.controller('myController', function ($scope) {

    $scope.myFunction=function(){
     alert("works")
    }
    
		$scope.myVar="myFunction()";
    
    //Execute this:
    //$scope.myVar() I dont know

});