diff --git a/artificial_potential.py b/artificial_potential.py
index 6f2e932..180d6e9 100644
--- a/artificial_potential.py
+++ b/artificial_potential.py
@@ -1,4 +1,3 @@
-# /usr/bin/python
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib.animation as animation
@@ -13,13 +12,13 @@
 
 def attractive_force(position, goal):
     """
-    Calculate the attractive force towards the goal.
+    Calculate the attractive force towards the goal
     """
     return -k_att * (position - goal)
 
 def repulsive_force(position, obstacles, d0, k_rep):
     """
-    Calculate the repulsive force from obstacles.
+    Calculate the repulsive force from obstacles
     """
     force = np.zeros(2)
     for obs in obstacles:
@@ -104,4 +103,4 @@ def update(frame):
 ax.set_title('Dynamic Potential Field')
 ax.grid()
 
-plt.show()
\ No newline at end of file
+plt.show()