diff --git a/deploy/roles/collectd/templates/demo.py b/deploy/roles/collectd/templates/demo.py
index 557853b..1076100 100644
--- a/deploy/roles/collectd/templates/demo.py
+++ b/deploy/roles/collectd/templates/demo.py
@@ -1,38 +1,49 @@
 #!/usr/bin/env python2
 
 import serial
 import time
 
 DEBUG = 0
 PORT = '/dev/ttyS1'
 SPEED = 9600
 LEDS_NUMBER = 8
-LEDS_MAX = 100
-TIME = 0.06
+LEDS_MAX = 80
+TIME = 0.1
 
 def debug(msg):
     if DEBUG:
         f = open('/tmp/debug_demo', 'a+')
         f.write(str(msg) + "\n")
         f.close()
 
 def kitt(ser):
     for i in xrange(1, 5):
         for j in xrange(1, 5):
             line = 'l%d ' % (j - 1) + '%d 0 0 ' % (LEDS_MAX if i==j else 0) * LEDS_NUMBER
             ser.write(line)
             debug(line)
             time.sleep(TIME)
     for i in xrange(3, 1, -1):
         for j in xrange(1, 5):
             line = 'l%d ' % (j - 1) + '%d 0 0 ' % (LEDS_MAX if i==j else 0) * LEDS_NUMBER
             ser.write(line)
             debug(line)
             time.sleep(TIME)
 
+def rainbow(ser):
+    for i in xrange(0, LEDS_MAX, 32):
+        for j in xrange(0, LEDS_MAX, 32):
+            for k in xrange(0, LEDS_MAX, 32):
+                for index in xrange(4):
+                    line = 'l%d ' % index + '%d %d %d ' % (i, j, k) * LEDS_NUMBER
+                    ser.write(line)
+                    debug(line)
+                    time.sleep(TIME)
+
+
 ser = serial.Serial(PORT, SPEED)
 try:
     while True:
-        kitt(ser)
+        rainbow(ser)
 except KeyboardInterrupt:
     ser.close()