I am using a similar code as bellow to control an rgb led strip, random values come in every few seconds and 3 threads are being created to control the 3 individual colours.

```
import time
from ast import literal_eval
import threading
from random import randint
t=[]
myR =0
myG =0
myB =0
temp = 0
pins = [17,22,24]
myColours = [myR,myG,myB]
red_pin = 17
green_pin = 22
blue_pin = 24

def change_led_color(rgb):
  global myR
  global myG
  global myB
  y = 0
  threads = []
  for colour in rgb:
    t = threading.Thread(target=leds,name=pins[y] ,args=(y,myColours[y],colour,pins[y]))
    threads.append(t)
    y += 1
  for y in threads:
    y.start()
  for y in threads:
    y.join()

def leds(index,start,end,pin):
  temp=0
  for i in range(start,end):
    time.sleep(0.01)
    temp = i
  global myColours
  print 'pin', pin, 'started at: ',start,' ended is: ', temp
  myColours[index] = end

def set_colours():
  print '..................................................................',t
  print threading.activeCount(),'threads \n'
  threading.Timer(2, set_colours).start()
  change_led_color(t)
set_colours()

def get_data():
  while True:
      global t
      t = (randint(0,255),randint(0,255),randint(0,255))
      time.sleep(2)
threading.Thread(target=get_data).start()

```

The above runs fine but the responses are very weird, instead of getting all the three colours at the end of the threads, I sometimes get more than expected and most of the times at least one will be 0, like the thread never run!
I am assuming I'm misusing the threading in some way..

e.g. outcome

```
.................................................................. (187, 223, 42)
3 threads 

pin 24 started at:  205  ended is:  0
pin 22 started at:  170  ended is:  222
pin 17 started at:  107  ended is:  186
.................................................................. (202, 115, 219)
3 threads 

pin 22 started at:  223  ended is:  0
pin 17 started at:  187  ended is:  201
.................................................................. (244, 35, 194)
5 threads 

pin 22 started at:  115  ended is:  0
pin 24 started at:  42  ended is:  218
pin 17 started at:  202  ended is:  243
pin 24 started at:  42  ended is:  193
.................................................................. (54, 25, 72)
3 threads 

pin 17 started at:  244  ended is:  0
pin 22 started at:  35  ended is:  0
 pin 24 started at:  194  ended is:  0

```