/* Blink Turns on an LED on for one second, then off for one second, repeatedly. This example code is in the public domain. */ // Connect a LED to Pin 3. It might be different in different ATtiny micro controllers int led = 3; // 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(1000); // wait for a second digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }