/*
  Blink
  Turns on an LED on for a specified time, then off for the same time, repeatedly.
 
  This example code is in the public domain.
 */
 
// Pin 8 is connected to an LED on my board
// give it a name:
int led = 8;
int del=1; //set the delay value in milliseconds

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);     
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(del);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(del);               // wait for a second
}