#include   //  libary file can be found here...  https://github.com/digistump/DigisparkArduinoIntegration/tree/master/libraries/DigisparkRGB

/*
 Digispark RGB
This example shows how to use soft PWM to fade 3 colors.
Note: This is only necessary for PB2 (pin 2) - Blue, as Red (pin 0) and Green (pin 1) as well as pin 4 support the standard Arduino analogWrite() function.
This example code is in the public domain.

 */

byte RED = 0;
byte BLUE = 2;
byte GREEN = 1;
byte COLORS[] = {RED, BLUE, GREEN};

// the setup routine runs once when you press reset:
void setup() { 
 DigisparkRGBBegin();
} 

void loop ()
{
//direction: up = true, down = false
boolean dir = true;
int i = 0;
while(1)
{
fade(COLORS[i%3], dir);
i++;
dir = !dir;
}
}

void fade(byte Led, boolean dir)
{
int i;
//if fading up
if (dir)
{
for (i = 0; i < 256; i++) 
{
DigisparkRGB(Led, i);
DigisparkRGBDelay(25);//1);
}
}
else
{
for (i = 255; i >= 0; i--) 
{
DigisparkRGB(Led, i);
DigisparkRGBDelay(25);//1);
}
}
}