diff --git a/main.py b/main.py
old mode 100644
new mode 100755
diff --git a/part_main.py b/part_main.py
deleted file mode 100644
index 93ec9c5..0000000
--- a/part_main.py
+++ /dev/null
@@ -1,33 +0,0 @@
-import pygame 
-from particle import ParticleSystem
-
-def main():
-    pygame.init()  
-    pantalla=pygame.display.set_mode([600,400])
-    salir=False
-    reloj1=pygame.time.Clock()
-
-    blanco=(255,255,255)
-
-    ps = ParticleSystem(0, "Test", 'gfx/burbuja.png')
-    ps.start()
-    
-    while not salir:
-        for event in pygame.event.get():
-            if event.type == pygame.QUIT:
-                salir=True
-            if event.type == pygame.KEYDOWN:
-                if event.key == pygame.K_ESCAPE:
-                    salir = True
-
-        ps.update()
-
-        pantalla.fill(blanco)
-        ps.draw(pantalla)
-        pygame.display.update()
-
-        reloj1.tick(60)
-        
-    pygame.quit()
-
-main()
diff --git a/particle.py b/particle.py
index 0d00aa1..f4c0ee8 100644
--- a/particle.py
+++ b/particle.py
@@ -1,3 +1,6 @@
+############################################
+# Created on 1-10-2013. Miguel Angel Astor #
+############################################
 import math
 import random
 
diff --git a/test_main.py b/test_main.py
new file mode 100755
index 0000000..52554c9
--- /dev/null
+++ b/test_main.py
@@ -0,0 +1,38 @@
+#! /usr/bin/env python
+############################################
+# Created on 1-10-2013. Miguel Angel Astor #
+############################################
+import pygame 
+from particle import ParticleSystem
+
+def main():
+    pygame.init()  
+    pantalla = pygame.display.set_mode([600,400])
+    done = False
+    clock = pygame.time.Clock()
+
+    white = (255,255,255)
+
+    ps = ParticleSystem(0, "Test", 'gfx/burbuja.png')
+    ps.start()
+    
+    while not done:
+        for event in pygame.event.get():
+            if event.type == pygame.QUIT:
+                done = True
+            if event.type == pygame.KEYDOWN:
+                if event.key == pygame.K_ESCAPE:
+                    done = True
+
+        ps.update()
+
+        screen.fill(white)
+        ps.draw(screen)
+        pygame.display.update()
+
+        clock.tick(60)
+        
+    pygame.quit()
+
+if __name__ =="__main__":
+    main()