This was a quick test for a multi color LED
int red = 2;
int green =3;
int blue =4;
int j;
void setup()
{
pinMode(red,OUTPUT);
pinMode(green,OUTPUT);
pinMode(blue,OUTPUT);
}
void loop()
{
for (j = 1; j < 10000; j++)
{
analogWrite(red,random(255));
delay (random(10,31));
analogWrite(green,random(255));
delay (random(10,31));
analogWrite(blue,random(255));
delay (random(10,31));
}
}