diff --git a/src/EasyGA.py b/src/EasyGA.py
index d58b06e..c5fb804 100644
--- a/src/EasyGA.py
+++ b/src/EasyGA.py
@@ -53,4 +53,7 @@ class GA:
         return create_gene(value)
 
     def make_chromosome(self):
-        pass
+        return create_chromosome()
+
+    def make_population(self):
+        return create_population()
diff --git a/src/run_testing.py b/src/run_testing.py
index 6af8b32..fa51016 100644
--- a/src/run_testing.py
+++ b/src/run_testing.py
@@ -4,12 +4,32 @@ import EasyGA
 # Create the Genetic algorithm
 ga = EasyGA.GA()
 
-# Start the population
-ga.initialize()
 
+def user_initialize():
+
+    population_size = 1
+    chromosome_length = 3
+
+    population = ga.make_population()
+    # Fill the population with chromosomes
+    for i in range(population_size):
+        chromosome = ga.make_chromosome()
+        #Fill the Chromosome with genes
+        for j in range(chromosome_length):
+            chromosome.add_gene(ga.make_gene("hello"))
+        population.add_chromosome(chromosome)
+    return population
+
+
+# Start the population
+ga.initialization_impl = user_initialize()
+
+#make gene
 new_gene = ga.make_gene("Hello")
 print(new_gene.get_value())
 print(new_gene.get_fitness())
 
+print(ga.population)
+
 for chromosome in ga.population.chromosomes:
     print(chromosome.genes[0].__dict__)