I can't tell exactly whats not working with your code,it would be really helpful if you elaborate more. But here I report some code that I wrote and I think it will get the job done:
//declare our variables: int myPins[] = {2, 4, 8, 3, 6}; //Enter the number of the pins being used int RNum = 0;
void loop() {
DigitalWrite(myPins[RNum],LOW);
RNum = Random(0,MAX) // MAX being the number of LEDs connected minus one
//the above generates a random number
DigitalWrite(myPins[RNum],High);
}
This will turn on one LED at a time.
