diff --git a/swp2.py b/swp2.py
new file mode 100644
index 0000000..461cc10
--- /dev/null
+++ b/swp2.py
@@ -0,0 +1,122 @@
+
+import matplotlib.pyplot as plt
+import os
+
+def return_x_y_from_stwp_theta_file(stwp_theta_file, breaks, mu, tgen):
+    with open(stwp_theta_file, "r") as swp_file:
+        # Read the first line
+        line = swp_file.readline()
+        L = float(line.split()[2])
+        # Process lines until the end of the file
+        while line:
+            # check at each line
+            if line.startswith("dim") :
+                dim = int(line.split()[1])
+                if dim == breaks+1:
+                    likelihood = line.split()[5]
+                    groups = line.split()[6:6+dim]
+                    theta_site = line.split()[6+dim:6+dim+1+dim]
+                elif dim < breaks+1:
+                    line = swp_file.readline()
+                    continue
+                elif dim > breaks+1:
+                    break
+                    #return 0,0,0
+            # Read the next line
+            line = swp_file.readline()
+    #### END of parsing
+    # quit this file if the number of dimensions is incorrect
+    if dim < breaks+1:
+        return 0,0,0 
+    # get n, the last bin of the last group
+    n = int(groups[-1].split(",")[-1])
+    # initiate the dict of times
+    t = {}
+    # list of thetas 
+    theta_L = []
+    sum_t = 0
+    for group_nb, group in enumerate(groups):
+        # store all the thetas one by one, with one theta per group
+        theta_L.append(float(theta_site[group_nb]))
+        # if the group is of size 1
+        if len(group.split(',')) == 1:
+            i = int(group)
+        # if the group size is >1, take the first elem of the group
+        # i is the first bin of each group, straight after a breakpoint
+        else:
+            i = int(group.split(",")[0])
+            j = int(group.split(",")[-1])
+        t[i] = 0
+        if len(group.split(',')) == 1:
+            k = i
+            t[i] += ((theta_L[group_nb] ) / (k*(k-1)) * tgen) / mu
+        else:
+            for k in range(i, j+1):
+                t[i] += ((theta_L[group_nb] ) / (k*(k-1)) * tgen) / mu
+        # we add the cumulative times at the end
+        t[i] += sum_t
+        sum_t = t[i]
+    # build the y axis (sizes)
+    y = []
+    for theta in theta_L:
+        # with size N = theta/4mu
+        size = theta / (4*mu)
+        y.append(size)
+        y.append(size)
+    # build the time x axis
+    x = [0]
+    for time in range(0, len(t.values())-1):
+        x.append(list(t.values())[time])
+        x.append(list(t.values())[time])
+    x.append(list(t.values())[len(t.values())-1])
+
+    return x,y,likelihood
+
+def plot_3epochs_thetafolder(folder_path, mu, tgen, breaks = 2, title = "Title"):
+    
+    scenari = {}
+    cpt = 0
+    
+    for file_name in os.listdir(folder_path):
+        if os.path.isfile(os.path.join(folder_path, file_name)):
+            # Perform actions on each file
+            x,y,likelihood = return_x_y_from_stwp_theta_file(folder_path+file_name, breaks = breaks, 
+                                                             tgen = tgen,
+                                                             mu = mu)
+            if x == 0 or y == 0:
+                continue
+            cpt +=1
+            scenari[likelihood] = x,y
+    print("\n*******\n"+title+"\n--------\n"+"mu="+str(mu)+"\ntgen="+str(tgen)+"\nbreaks="+str(breaks)+"\n*******\n")
+    print(cpt, "theta files have been scanned.")
+    # sort starting by the smallest -log(Likelihood)
+    best10_scenari = (sorted(list(scenari.keys())))[:10]
+    print("10 greatest Likelihoods", best10_scenari)
+    greatest_likelihood = best10_scenari[0]
+    x, y = scenari[greatest_likelihood]
+    my_dpi = 300
+    plt.figure(figsize=(5000/my_dpi, 2800/my_dpi), dpi=my_dpi)
+    plt.plot(x, y, 'r-', lw=2, label = 'Lik='+greatest_likelihood)
+    for scenario in best10_scenari[1:]:
+        x,y = scenari[scenario]
+        print("\n----  Lik:",scenario,"\n\nt=", x,"\n\nN=",y, "\n\n")
+        plt.plot(x, y, '--', lw=1, label = 'Lik='+scenario)
+    plt.ylabel("Individuals (N)")
+    plt.xlabel("Time (years)")
+    plt.legend(loc='upper right')
+    plt.title(title)
+    #plt.gcf().set_size(1000, 500)
+    plt.savefig(title+'_b'+str(breaks)+'.pdf')
+    #plt.show()
+
+if __name__ == "__main__":
+            
+    if len(sys.argv) != 4:
+        print("Need 3 args: ThetaFolder MutationRate GenerationTime")
+        exit(0)
+        
+    folder_path = sys.argv[1]
+    mu = sys.argv[2]
+    tgen = sys.argv[3]
+
+    plot_3epochs_thetafolder(folder_path, mu, tgen)