Simple RGB LED Example

/* This is a simple way to use one potentiometer to get varying colors out of a common-cathode RGB LED
   Check out this sketch to cycle through millions of colors: https://gist.github.com/jamesotron/766994
*/

int sensorPin = A0;     // connect a sensor or potentiometer to analog input A0
int sensorValue = 0;  
int redPin = 3;         // use PWM outputs on digital pins 3, 5, 6 - connect to RGB LED via 220 Ohm resistors
int greenPin = 5;
int bluePin = 6;

void setup() 
{  /* nothing to do in setup */  }

void loop() 
{
  sensorValue = analogRead(sensorPin);    

  analogWrite(redPin, sensorValue);
  analogWrite(greenPin, sensorValue/2);    // dividing by different numbers to get some color variability
  analogWrite(bluePin, sensorValue/3);
}