old_contents: #!/usr/bin/env python2.7
  # script by Alex Eames http://RasPi.tv
  #http://RasPi.tv/2013/how-to-use-soft-pwm-in-rpi-gpio-pt-2-led-dimming-and-motor-speed-control
  # Using PWM with RPi.GPIO pt 2 - requires RPi.GPIO 0.5.2a or higher
  
  import RPi.GPIO as GPIO # always needed with RPi.GPIO
  from time import sleep  # pull in the sleep function from time module
  import os
  loads[] = os.getloadavg()
  GPIO.setmode(GPIO.BCM)  # choose BCM or BOARD numbering schemes. I use BCM
  
  GPIO.setup(25, GPIO.OUT)# set GPIO 25 as output for white led
  GPIO.setup(24, GPIO.OUT)# set GPIO 24 as output for red led
  
  white = GPIO.PWM(25, 100)    # create object white for PWM on port 25 at 100 Hertz
  red = GPIO.PWM(24, 100)      # create object red for PWM on port 24 at 100 Hertz
  
  white.start(0)              # start white led on 0 percent duty cycle (off)
  red.start(100)              # red fully on (100%)
  
  # now the fun starts, we'll vary the duty cycle to 
  # dim/brighten the leds, so one is bright while the other is dim
  
  pause_time = 0.06           # you can change this to slow down/speed up
  pause_time = loads[1]
  try:
      while True:
          for i in range(15,101,5):      # 101 because it stops when it finishes 100
              white.ChangeDutyCycle(i)
              red.ChangeDutyCycle(100 - (i - 5))
              sleep(pause_time)
          for i in range(100,15,-5):      # from 100 to zero in steps of -1
              white.ChangeDutyCycle(i)
              red.ChangeDutyCycle(100 - (i - 5))
              sleep(pause_time)
  
  except KeyboardInterrupt:
      white.stop()            # stop the white PWM output
      red.stop()              # stop the red PWM output
      GPIO.cleanup()          # clean up GPIO on CTRL+C exit
  
new_contents: #!/usr/bin/env python2.7
  # script by Alex Eames http://RasPi.tv
  #http://RasPi.tv/2013/how-to-use-soft-pwm-in-rpi-gpio-pt-2-led-dimming-and-motor-speed-control
  # Using PWM with RPi.GPIO pt 2 - requires RPi.GPIO 0.5.2a or higher
  
  import RPi.GPIO as GPIO # always needed with RPi.GPIO
  from time import sleep  # pull in the sleep function from time module
  import os
  loads = os.getloadavg()
  GPIO.setmode(GPIO.BCM)  # choose BCM or BOARD numbering schemes. I use BCM
  
  GPIO.setup(25, GPIO.OUT)# set GPIO 25 as output for white led
  GPIO.setup(24, GPIO.OUT)# set GPIO 24 as output for red led
  
  white = GPIO.PWM(25, 100)    # create object white for PWM on port 25 at 100 Hertz
  red = GPIO.PWM(24, 100)      # create object red for PWM on port 24 at 100 Hertz
  
  white.start(0)              # start white led on 0 percent duty cycle (off)
  red.start(100)              # red fully on (100%)
  
  # now the fun starts, we'll vary the duty cycle to 
  # dim/brighten the leds, so one is bright while the other is dim
  
  #pause_time = 0.06           # you can change this to slow down/speed up
  pause_time = loads[1]
  try:
      while True:
          for i in range(15,101,5):      # 101 because it stops when it finishes 100
              white.ChangeDutyCycle(i)
              red.ChangeDutyCycle(100 - (i - 5))
              sleep(pause_time)
          for i in range(100,15,-5):      # from 100 to zero in steps of -1
              white.ChangeDutyCycle(i)
              red.ChangeDutyCycle(100 - (i - 5))
              sleep(pause_time)
  
  except KeyboardInterrupt:
      white.stop()            # stop the white PWM output
      red.stop()              # stop the red PWM output
      GPIO.cleanup()          # clean up GPIO on CTRL+C exit
  
subject: fix array syntax