/*
 LEDs sketch
 Blink three LEDs each connected to a different digital pin
 */
const int firstLedPin = 3; // choose the pin for each of the LEDs
const int secondLedPin = 5;
const int thirdLedPin = 6;
void setup()
{
 pinMode(firstLedPin, OUTPUT); // declare LED pins as output
 pinMode(secondLedPin, OUTPUT); // declare LED pins as output
 pinMode(thirdLedPin, OUTPUT); // declare LED pins as output
}
void loop()
{
 // flash each of the LEDs for 1000 milliseconds (1 second)
 blinkLED(firstLedPin, 1000);
 blinkLED(secondLedPin, 1000);
 blinkLED(thirdLedPin, 1000);
}
// blink the LED on the given pin for the duration in milliseconds
void blinkLED(int pin, int duration)
{
 digitalWrite(pin, HIGH); // turn LED on
 delay(duration);
 digitalWrite(pin, LOW); // turn LED off
 delay(duration);
}