CODE EXAMPLE FOR PYTHON

raspberry pi pwm controlled leds

import RPi.GPIO as GPIO             
from time import sleep              

redLED = 18				
blueLED = 12            
greenLED = 19         

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)

GPIO.setup(redLED,GPIO.OUT)    
GPIO.setup(blueLED,GPIO.OUT)   
GPIO.setup(greenLED,GPIO.OUT)  

red_pwm = GPIO.PWM(redLED,1000)
blue_pwm = GPIO.PWM(blueLED,1000) 
green_pwm = GPIO.PWM(greenLED,1000) 

red_pwm.start(0)			
blue_pwm.start(0)                       
green_pwm.start(0)                      

print("AH Shit! Here we go again! Press CTRL+C to exit")

try:
    while True:                                         
        for duty in range(0,101,1):                     
            red_pwm.ChangeDutyCycle(duty)               
            sleep(0.01)                                 
        sleep(0.5)                                      

        for duty in range(100,-1,-1):                   
            red_pwm.ChangeDutyCycle(duty)               
            sleep(0.01)                                 
        sleep(0.5)                                      
		
        for duty in range (0, 101, 1):                  
            blue_pwm.ChangeDutyCycle(duty)
            sleep(0.01)
        sleep(0.5)

        for duty in range (100, -1, -1):                
            blue_pwm.ChangeDutyCycle(duty)
            sleep(0.01)
        sleep(0.5)

        for duty in range(0,101,1):                     
            green_pwm.ChangeDutyCycle(duty)
            sleep(0.01)
        sleep(0.5)

        for duty in range(100,-1,-1):                   
            green_pwm.ChangeDutyCycle(duty)
            sleep(0.01)
        sleep(0.5)

except KeyboardInterrupt: 		
    red_pwm.stop() 			
    blue_pwm.stop() 
    green_pwm.stop()
    GPIO.cleanup()