diff --git a/materials/make_pizzas_ruff_demo.py b/materials/make_pizzas_ruff_demo.py
index dd21416..240bb68 100644
--- a/materials/make_pizzas_ruff_demo.py
+++ b/materials/make_pizzas_ruff_demo.py
@@ -1,18 +1,15 @@
 
-import numpy as np
 
 from italianfood.dough import PizzaDough
 from italianfood.ovens import bake_pizza
-
-pizzaName = "Hello pizza"
-
-
+import numpy as np
+import time
+pizzaName='Hello pizza'
 class Pizza:
     dough: PizzaDough
     num_pizzas: int = 1
     is_ready: bool = False
     some_array: np.ndarray | None = None
-
     def __init__(self, dough, num_pizza_balls):
         if num_pizza_balls < 1:
             raise ValueError("Number of pizza balls must be at least 1.")
@@ -27,40 +24,35 @@ class Pizza:
         )
         print("Now imagine expert pizza tossing skills!\n...")
 
-        return self
 
+
+
+
+
+        return self
     def add_toppings(self, toppings):
         self.toppings = toppings
         print(f"Adding {self.toppings} to pizza(s).\n...")
         return self
 
 
+
+
 def make_margherita_pizza(num_pizzas: int = 1):
-    total_flour_weight = 180 * num_pizzas
-    total_water_weight = 126 * num_pizzas
-    total_salt_weight = 2 * num_pizzas
-    total_yeast_weight = 1 * num_pizzas
-
-    dough = PizzaDough(
-        flour_weight=total_flour_weight,
-        water_weight=total_water_weight,
-        salt_weight=total_salt_weight,
-        yeast_weight=total_yeast_weight,
-    )
-
+    total_flour_weight=180* num_pizzas
+    total_water_weight=   126   *num_pizzas
+    total_salt_weight = 2*num_pizzas
+    total_yeast_weight =1 *num_pizzas
+    dough = PizzaDough(flour_weight=total_flour_weight,water_weight=total_water_weight,salt_weight=total_salt_weight,yeast_weight=total_yeast_weight)
     toppings = ["tomato sauce", "mozzarella cheese", "fresh basil"]
 
-    pizza = Pizza(dough=dough, num_pizza_balls=num_pizzas)
-    pizza.add_toppings(toppings)
 
+    pizza = Pizza(dough=dough, 
+		num_pizza_balls=num_pizzas)
+    pizza.add_toppings(toppings)
     baked_pizza = bake_pizza(pizza)
 
+
+
+
     return baked_pizza
-
-
-import pandas
-
-df = pandas.DataFrame(
-    {"col_a": [i for i in range(20)], "col_b": [j for j in range(20, 40)]}
-)
-df.drop(columns="col_b", inplace=True)