diff --git a/Form.php b/Form.php
new file mode 100644
index 0000000..0130477
--- /dev/null
+++ b/Form.php
@@ -0,0 +1,32 @@
+<?php
+require_once('Interface.php');
+
+abstract class Circle implements Shape {
+    private $radius;
+
+    public function __construct($radius) {
+        $this->radius = $radius;
+    }
+
+    public function getRadius() {
+        return $this->radius;
+    }
+
+    public function setRadius($radius) {
+        $this->radius = $radius;
+    }
+
+    public function getArea() {
+        return pi() * pow($this->radius, 2);
+    }
+
+    public function getPerimeter() {
+        return 2 * pi() * $this->radius;
+    }
+}
+
+$circle = new Circle(5);
+echo "Circle Area: <br>" . $circle->getArea(), '<br>';
+echo "Circle Perimeter: <br> " . $circle->getPerimeter(), '<br>';
+
+?>
\ No newline at end of file
diff --git a/Interface.php b/Interface.php
new file mode 100644
index 0000000..6b62e90
--- /dev/null
+++ b/Interface.php
@@ -0,0 +1,9 @@
+<?php
+require_once('Form.php');
+
+interface Shape {
+    public function getArea();
+    public function getPerimeter();
+};
+
+?>
diff --git a/README.md b/README.md
index e644e6a..30ad2d9 100644
--- a/README.md
+++ b/README.md
@@ -134,3 +134,16 @@ Namespaces are qualifiers that solve two different problems:
 2. They allow the same name to be used for more than one class
 
 In this file you will learn how to create and use namespaces.
+
+### [Namespaces](Vehicle.php) <!-- omit in toc -->
+Main file that creates and destructs the data
+
+### [Namespaces](Road_legal.php) <!-- omit in toc -->
+Secondary file that rewrites the main data 
+
+
+### [Namespaces](Form.php) <!-- omit in toc -->
+Main file that constructs the data using an abstract class
+
+### [Namespaces](Interface.php) <!-- omit in toc -->
+Secondary file that uses the data from the main file "Form"
\ No newline at end of file
diff --git a/Road_legal.php b/Road_legal.php
new file mode 100644
index 0000000..3ef5219
--- /dev/null
+++ b/Road_legal.php
@@ -0,0 +1,41 @@
+<?php
+require_once('Vehicle.php');
+
+
+class RoadLeagal extends Vehicle {
+    private static $numOfCars = 0;
+    private $activeAero;
+
+    public function __construct($make, $model, $year, $activeAero) {
+        parent::__construct($make, $model, $year);
+        $this->activeAero = $activeAero;
+        self::$numOfCars++;
+    }
+
+    public function getActiveAero() {
+        return $this->activeAero;
+    }
+
+    public function setActiveAero($activeAero) {
+        $this->activeAero = $activeAero;
+    }
+
+    public function startAero() {
+        return "The active aerodinamic is working.<br>";
+    }
+
+    public static function getNumOfCars() {
+        return self::$numOfCars;
+    }
+}
+
+$electricCar = new RoadLeagal('Pagani', 'Huayra', 2011, 'Active');
+echo $electricCar->getMake(), '<br>';
+echo $electricCar->getModel(), '<br>';
+echo $electricCar->getYear(), '<br>';
+echo $electricCar->getActiveAero(), '<br>';
+echo RoadLeagal::getNumOfCars(), '<br><br>';
+
+
+
+?>
\ No newline at end of file
diff --git a/Vehicle.php b/Vehicle.php
new file mode 100644
index 0000000..4fb5b9f
--- /dev/null
+++ b/Vehicle.php
@@ -0,0 +1,58 @@
+<?php
+class Vehicle {
+    protected $make;
+    protected $model;
+    protected $year;
+
+    public function __construct($make, $model, $year) {
+        $this->make = $make;
+        $this->model = $model;
+        $this->year = $year;
+    }
+
+    public function __destruct() {
+        echo "The vehicle has been destroyed.<br>";
+    }
+
+    public function getMake() {
+        return $this->make;
+    }
+
+    public function getModel() {
+        return $this->model;
+    }
+
+    public function getYear() {
+        return $this->year;
+    }
+
+    public function startEngine() {
+        return "The engine is running.<br>";
+    }
+
+    public function stopEngine() {
+        return "The engine is off.<br>";
+    }
+
+}
+
+class Car extends Vehicle {
+    private $doors;
+
+    public function __construct($make, $model, $year, $doors) {
+        parent::__construct($make, $model, $year);
+        $this->doors = $doors;
+    }
+
+    public function getDoors() {
+        return $this->doors;
+    }
+}
+
+$car = new Car('Pagani', 'Zonda R', 1999, 2);
+echo $car->getMake(), '<br>';
+echo $car->getModel(), '<br>';
+echo $car->getYear(), '<br>';
+echo $car->getDoors(), '<br><br>';
+
+?>
\ No newline at end of file