diff --git a/starter-code/pizza.js b/starter-code/pizza.js
index b473d048..15b334be 100755
--- a/starter-code/pizza.js
+++ b/starter-code/pizza.js
@@ -1 +1,98 @@
-// Write your Pizza Builder JavaScript in this file.
+$(document).ready(function(){
+  
+  // SET UP MY DEFAULT PIZZA
+  // default sauce and crust
+  // hidden prices of ingredients we don't want
+
+  var buttonSauce = $(".btn-sauce");
+  var buttonCrust = $(".btn-crust");
+  var sauce = $(".sauce");
+  var crust = $(".crust");
+
+  function defaultPizza() {
+    sauce.removeClass("sauce-white");
+    crust.removeClass("crust-gluten-free");
+    buttonSauce.removeClass("active");
+    buttonCrust.removeClass("active");
+    $(".panel ul li:contains('white')").hide();
+    $(".panel ul li:contains('gluten')").hide();
+  }
+
+  defaultPizza();
+
+  // DISPLAY INGREDIENTS (MUSHROOMS/PEPERONNIS/GREENPEPPERS) DEPENDING ON THE PRESSED BUTTONS
+  // when we press a given button it adds/removes the ingredients we target
+
+  var buttonPepperonnis = $(".btn-pepperonni");
+  var buttonMushrooms = $(".btn-mushrooms");
+  var buttonGreenpeppers = $(".btn-green-peppers");
+  var pepperonnis = $(".pep");
+  var mushrooms = $(".mushroom");
+  var greenpeppers = $(".green-pepper");
+
+  function toggleIngredients(button,ingredients) {
+    button.click(function(){
+      ingredients.toggle();
+      button.toggleClass("active");
+    })
+  }
+
+  toggleIngredients(buttonPepperonnis,pepperonnis);
+  toggleIngredients(buttonMushrooms,mushrooms);
+  toggleIngredients(buttonGreenpeppers,greenpeppers);
+
+  // SWITCH BETWEEN TWO TYPES FOR ONE GIVEN TOPPING (SAUCE/CRUST)
+  // for one given topping, adds/removes a class that changes the type of topping
+
+  buttonSauce.click(function(){
+    sauce.toggleClass("sauce-white");
+    buttonSauce.toggleClass("active");
+    $(".panel ul li:contains('white')").toggle();
+  })
+
+  buttonCrust.click(function(){
+    crust.toggleClass("crust-gluten-free");
+    buttonCrust.toggleClass("active");
+    $(".panel ul li:contains('gluten')").toggle();
+  })
+
+  // DISPLAY PRICES DEPENDING ON THE PRESSED BUTTONS
+  // when we press a given button (mushrooms Button for ex.), using a keyword (ex:"mushroom") that is inside the <li> we target (thanks to the selector)
+  // it shows/hides this price of this element
+
+  function togglePrices(button,keyword,selector) {
+    button.click(function(){
+      $(selector + ":contains('" + keyword + "')").toggle();
+    })
+  }
+
+  togglePrices(buttonPepperonnis,"pepperonni",".panel ul li");
+  togglePrices(buttonMushrooms, "mushrooms",".panel ul li");
+  togglePrices(buttonGreenpeppers, "green",".panel ul li");
+
+  // CHECK FOR TOTAL PRICE
+  // everytime a ingredient button is pressed, and depending if this item is shown or not on the page, we add its price to the total price
+  
+  function updateTotalPrice(){
+    let myTotalPriceContainer = $("strong");
+    myTotalPriceContainer.text("$"+calculateTotalPrice());
+  };
+
+  function calculateTotalPrice() {
+    let myTotalPrice = 10;
+    let myAdditionalPricesContainer = $(".price  ul li");
+    myAdditionalPricesContainer.each(function(){
+      if ($(this).css("display") !== "none") {
+        myTotalPrice += parseInt($(this).text().substr(1,1));
+      }
+    });
+    return myTotalPrice;
+  }
+
+  updateTotalPrice();
+
+  $(".btn").click(function(){
+    updateTotalPrice();
+  })
+
+})