int ledPin=8; //definition digital 8 pins as pin to control the LED


void setup()
{
pinMode(ledPin,OUTPUT); //Set pin 8 as output
}


void loop()
{
digitalWrite(ledPin,HIGH); //Turn on the LED by sending a HIGH (about 5V) signal to pin 8.
delay(1000);  //Set the delay time, 1000 = 1S
digitalWrite(ledPin,LOW); //Turn off the LED by sending a low (about 0V) signal to pin 8.
delay(1000);//Set the delay time, 1000 = 1S
}