/* Blink Turns on an LED on for five seconds, then off for five seconds, repeatedly. This example code is in the public domain. */ // Pin 13 has an LED connected on most Arduino boards. // give it a name: int led = 13; // 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(5000); // wait for 5 seconds digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(5000); // wait for 5 seconds }