// Creating an Electronic Die
void setup()
{
randomSeed(analogRead(0)); // seed the random number generator
for ( int z = 1 ; z < 7 ; z++ ) // LEDs on pins 1-6 are output
{
pinMode(z, OUTPUT);
}
}
void randomLED(int del)
{
int r;
r = random(1, 7); // get a random number from 1 to 6
digitalWrite(r, HIGH); // output to the matching LED on digital pin 1-6
if (del > 0)
{
delay(del); // hold the LED on for the delay received
}
 else if (del == 0)
{
do // the delay entered was zero, hold the LED on forever
{}
 while (1);
}
digitalWrite(r, LOW); // turn off the LED
}
void loop()
{
int a;
// cycle the LEDs around for effect
for ( a = 0 ; a < 100 ; a++ )
{
randomLED(50);
}
// slow down
 for ( a = 1 ; a <= 10 ; a++ )
{
randomLED(a * 100);
}
// and stop at the final random number and LED
randomLED(0);
}