diff --git a/index.html b/index.html
index be6da78c5e9ec9f23846a724d7820f71b1816897..d6a7d2b554dc4837c83a32dfc911fa5f224f8c8c 100644
--- a/index.html
+++ b/index.html
@@ -32,16 +32,28 @@
 </div>
 
 <!-- include prototypes here -->
+<script src="./js/extra.js"></script>
+<script src="./js/car.js"></script>
 
 <script>
 
     function generateCar(image, make, model, description, price, category, year, mileage, extras) {
         //Create an array of Extra instances based on Extras names and prices
         // Create a new Car instance
+        const extraInstances = extras.map(extra => new Extra(extra.name, extra.price));
+
+        return new Car(image, make, model, description, price, category, year, mileage, extraInstances);
     }
 
     function showHideExtra(btn,elt,car) {
-
+        if (elt.style.display == 'none'){
+            elt.style.display = 'block';
+            btn.innerHTML = '-';
+        }
+        else{
+            elt.style.display = 'none';
+            btn.innerHTML = '+';
+        }
     }
 
 
diff --git a/js/car.js b/js/car.js
new file mode 100644
index 0000000000000000000000000000000000000000..b425c31c868040335029c5b056bf69044c6db030
--- /dev/null
+++ b/js/car.js
@@ -0,0 +1,31 @@
+function Car(image, make, model, description, price, category, year, mileage, extras) {
+    this.image = image;
+    this.make = make;
+    this.model = model;
+    this.description = description;
+    this.price = price;
+    this.category = category;
+    this.year = year;
+    this.mileage = mileage;
+    this.extras = extras;
+}
+
+Car.prototype.generateImage = function(elt) {
+    const img = document.createElement('img');
+    img.src = this.image;
+    img.alt = this.make + " " + this.model;
+    img.classList.add('card-img-top');
+    elt.appendChild(img);
+};
+
+Car.prototype.generateExtras = function(elt) {
+    const ul = document.createElement('ul');
+
+    this.extras.forEach(extra => {
+        const li = document.createElement('li');
+        li.textContent = extra.name + ' - ' + extra.price + '€';
+        ul.appendChild(li);
+    });
+
+    elt.appendChild(ul);
+};
\ No newline at end of file
diff --git a/js/extra.js b/js/extra.js
new file mode 100644
index 0000000000000000000000000000000000000000..d5f7ff9bd055aaff03a975e7372fe578b0c8ea21
--- /dev/null
+++ b/js/extra.js
@@ -0,0 +1,4 @@
+function Extra(name, price) {
+    this.name = name;
+    this.price = price;
+}
\ No newline at end of file