diff --git a/deploy/roles/collectd/templates/demo.py b/deploy/roles/collectd/templates/demo.py
index 232713c..d812f9b 100644
--- a/deploy/roles/collectd/templates/demo.py
+++ b/deploy/roles/collectd/templates/demo.py
@@ -1,77 +1,79 @@
 #!/usr/bin/env python2
 
 import serial
 import time
 
 DEBUG = 1
 SERIAL = 1
 
 PORT = '/dev/ttyS1'
 SPEED = 9600
 
 LEDS_NUMBER = 8
 LEDS_MAX = 100
 TIME = 0.1
 
 def debug(msg):
     if DEBUG:
         f = open('/tmp/debug_demo', 'a+')
         f.write(str(msg) + "\n")
         f.close()
 
 def write(line):
     if SERIAL:
         ser.write(line)
     debug(line)
 
 def kitt(ser):
     for i in [0, 1, 2, 3, 2, 1]:
         for j in xrange(4):
             line = 'l%d ' % j + '%d 0 0 ' % (LEDS_MAX if i==j else 0) * LEDS_NUMBER
             write(line)
             time.sleep(TIME)
 
 def colors():
     step = 32
     for r in xrange(0, LEDS_MAX, step):
         for g in xrange(0, LEDS_MAX, step):
             for b in xrange(0, LEDS_MAX, step):
                 for index in xrange(4):
                     line = 'l%d ' % index + '%d %d %d ' % (r, g, b) * LEDS_NUMBER
                     write(line)
                     time.sleep(TIME)
 
 def text():
     letters = [
         [[0,1,0,0,0,1,0,0],[0,1,0,1,0,1,0,0],[0,1,0,1,0,1,0,0],[0,1,1,1,1,1,0,0]],  # E
         [[0,1,1,1,0,0,0,0],[0,1,0,1,0,0,0,0],[0,1,0,1,0,0,0,0],[0,1,1,1,1,1,0,0]],  # P
         [[0,1,0,0,0,0,0,0],[0,1,0,1,0,0,0,0],[0,1,0,1,0,0,0,0],[0,1,1,1,1,1,0,0]],  # F
         [[0,0,0,0,0,1,0,0],[0,0,0,0,0,1,0,0],[0,0,0,0,0,1,0,0],[0,1,1,1,1,1,0,0]],  # L
        #[[0,1,0,1,1,1,0,0],[0,1,0,1,0,1,0,0],[0,1,0,1,0,1,0,0],[0,1,1,1,0,1,0,0]],
        #[[0,1,1,1,1,1,0,0],[0,1,0,0,0,1,0,0],[0,1,0,0,0,1,0,0],[0,1,1,1,1,1,0,0]],
        #[[0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0],[0,1,1,1,1,1,0,0],[0,0,0,0,0,0,0,0]],
        #[[0,0,0,0,0,0,0,0],[0,1,0,0,0,0,0,0],[0,1,1,1,1,1,0,0],[0,1,0,0,0,0,0,0]],
        #[[0,1,1,1,1,1,0,0],[0,1,0,1,0,0,0,0],[0,1,0,1,0,0,0,0],[0,1,1,1,1,1,0,0]],
        #[[0,1,0,1,1,1,0,0],[0,1,0,1,0,1,0,0],[0,1,0,1,0,1,0,0],[0,1,1,1,0,1,0,0]],
         [[0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0]], # NULL
     ]
     for l in letters:
-        for r in letters[l]:
-            line = 'l%d ' % l \
+        index = 0
+        for r in l:
+            line = 'l%d ' % index \
                     + ' '.join([str(x).replace("1", str(LEDS_MAX)) + ' 0 0 '
                                 for x in r])
             write(line)
             time.sleep(0.06)
+            index += 1
         time.sleep(0.6)
 
 ser = None
 if SERIAL:
     ser = serial.Serial(PORT, SPEED)
 try:
     while True:
         text()
         #colors()
         #kitt()
 except KeyboardInterrupt:
     if SERIAL:
         ser.close()