diff --git a/03_euler_gen_alg/__pycache__/utils.cpython-312.pyc b/03_euler_gen_alg/__pycache__/utils.cpython-312.pyc
new file mode 100644
index 0000000..e10f3cb
Binary files /dev/null and b/03_euler_gen_alg/__pycache__/utils.cpython-312.pyc differ
diff --git a/03_euler_gen_alg/main.py b/03_euler_gen_alg/main.py
index 9dbd273..26926fa 100644
--- a/03_euler_gen_alg/main.py
+++ b/03_euler_gen_alg/main.py
@@ -17,27 +17,33 @@ import utils
 
 POPULATION_SIZE = 10
 SELECTION_SIZE = (POPULATION_SIZE * 7) // 10  # 70% of population, rounded down for selection
-CROSSOVER_PAIR_SIZE = (POPULATION_SIZE - SELECTION_SIZE) // 2  # pairs needed for crossover
+XOVER_PAIR_SIZE = (POPULATION_SIZE - SELECTION_SIZE) // 2  # pairs needed for crossover
 XOVER_POINT = 3 # 4th position
 MUTATION_BITS = POPULATION_SIZE * 1
 
-fitness = 0.01
-pop_grey = []
-pop_bin = [] # 32 Bit Binary
-pop_bin_params = []
-pop_new = [] # 32 Bit Grey-Code as String
+fitness = 1
+grey_pop = []
+bin_pop = [] # 32 Bit Binary
+bin_pop_params = []
+new_pop = [] # 32 Bit Grey-Code as String
 
 e_func = lambda x: np.e**x
 
-def generate_random_population():
+def generate_random_population(num=POPULATION_SIZE):
     """ Puts random 32 Bit binary strings into 4 * 8 Bit long params. """
-    # Random population array
-    for i in range(POPULATION_SIZE):
-        pop_grey[i] = format(random.getrandbits(32), '32b')
-        pop_bin[i] = utils.grey_to_bin(pop_grey[i])
-        pop_bin_params[i] = [pop_bin[i][0:7], pop_bin[i][8:15], pop_bin[i][16:23], pop_bin[i][24:31]]
+        
+    # Generate new population
+    for _ in range(num):
+        grey = format(random.getrandbits(32), '32b')
+        grey_pop.append(grey)
+        
+        bin_str = utils.grey_to_bin(grey)
+        bin_pop.append(bin_str)
+        
+        params = [bin_str[i:i+7] for i in range(0, 31, 8)]
+        bin_pop_params.append(params)
 
-    return pop_bin_params
+    return bin_pop_params
 
 def quadratic_error(original_fn, approx_fn, n):
     error = 0.0
@@ -47,10 +53,10 @@ def quadratic_error(original_fn, approx_fn, n):
         
     return error
 
-def eval_fitness(pop_bin_values):
+def eval_fitness(bin_pop_values):
     """ Returns an array with fitness value of every individual in a population. """
     fitness_arr = []
-    for params in pop_bin_values:    
+    for params in bin_pop_values:
         # Convert binary string to parameters for bin_values
         a, b, c, d = [utils.bin_to_param(param) for param in params] # assign params to batch of population
         
@@ -60,7 +66,7 @@ def eval_fitness(pop_bin_values):
         print(fitness) # debugging
         
         fitness_arr.append(fitness) # save fitness
-        # save params # already saved in pop_grey
+        # save params # already saved in grey_pop
         
     return fitness_arr
 
@@ -76,7 +82,7 @@ def select(population, fitness_arr):
                 cumulative_p += fitness / sum_of_fitness
                 if roulette_num < cumulative_p:
                     # Add the 32 Bit individual in grey code to population
-                    population.append(pop_grey[i])
+                    population.append(grey_pop[i])
                     
                     # Calc new sum of fitness
                     fitness_arr.pop(i)
@@ -84,12 +90,13 @@ def select(population, fitness_arr):
                     
                     is_chosen = True # break while loop
                     break # break for loop
+    return population
            
-def xover(population, xover_rate):
+def xover(population, xover_rate=XOVER_PAIR_SIZE):
     """Performs crossover on pairs of individuals from population."""
     offspring = []
     
-    # Process pairs while we have enough individuals and haven't reached CROSSOVER_PAIR_SIZE
+    # Process pairs while we have enough individuals and haven't reached xover_rate
     pair_count = 0
     i = 0
     while i < len(population) - 1 and pair_count < xover_rate:
@@ -118,26 +125,34 @@ def mutate(population, mutation_rate):
         bits[bit_pos] = '1' if bits[bit_pos] == '0' else '0'
         
         # Convert back to string and update population
-        population[random_num] = ''.join(bits)      
+        population[random_num] = ''.join(bits) # will work because lists are passed by reference
          
 def main():
-    pop_bin_values = generate_random_population(10)
+    bin_pop_values = generate_random_population(POPULATION_SIZE)
+    print(bin_pop_values)
     while fitness > 0.01:
-        
         # Evaluate fitness
-        fitness_arr = eval_fitness(pop_bin_values)    
-          
+        fitness_arr = eval_fitness(bin_pop_values)    
+        
         # Selection        
-        select(pop_new, fitness_arr) # Alters pop_new
+        new_pop = select(new_pop, fitness_arr) # Alters new_pop
+        print(new_pop)
+        time.sleep(1)
                 
-        # Crossover        
-        offspring = xover(pop_new, CROSSOVER_PAIR_SIZE)
-        pop_new.extend(offspring)  # .extend needed
+        """# Crossover        
+        offspring = xover(new_pop, XOVER_PAIR_SIZE)
+        new_pop.extend(offspring)  # .extend needed
         
         # Mutation
-        mutate(pop_new, MUTATION_BITS)
+        mutate(new_pop, MUTATION_BITS)
         
-        pop_grey = pop_new
+        # Update populations for next generation
+        grey_pop = new_pop.copy()
+        bin_pop_values = []
+        for grey_bin_string in grey_pop:
+            bin_str = utils.grey_to_bin(grey_bin_string)
+            params = [bin_str[i:i+7] for i in range(0, 31, 8)]
+            bin_pop_values.append(params)"""
     return 0
 
 if __name__ == "__main__":