gistfile1.js

var b = require('bonescript');
//
// Set up the starting conditions
var awPin = ["P8_13", "P9_14", "P9_21"]; // these are PWM output pins
var awValue = [0.01, 0.99, 0.50]; // starting values for the pins - 0 < pin < 1.0
var awDirection = [1, - 1, - 1]; // used to set ascending or descending values
var awStep = [0.01, 0.005, 0.015]; // step sizes for PWM change in each loop
//
// Configure pins
for (var i = 0; i < 3; i++) {
  b.pinMode(awPin[i], b.OUTPUT);
  //
  // Call the function to perform the fade every 10 ms
  setInterval(fade, 10);
  //
  // Function to fade the RGB LED
  function fade() {
    for (var i = 0; i < 3; i++) {
      b.analogWrite(awPin[i], awValue[i]); // set the pin value
      awValue[i] += (awDirection[i] * awStep[i]);
      if (awValue[i] > 1.0) {
        awValue[i] = 1.0;
        awDirection[i] = -1;
      }
      if (awValue[i] < 0.01) {
        awValue[i] = 0.01;
        awDirection[i] = 1;
      }
    }
  }
}