/* Blink Turns an LED on for one second, then off for one second, repeatedly. */ #define LED PA3 // ATtiny44 pin 10 that is connected to the on-board LED // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED as an output. pinMode(LED, OUTPUT); } // the loop function runs over and over again forever void loop() { digitalWrite(LED, HIGH); // turn the LED on (HIGH is the voltage level) delay(3000); // wait for a second digitalWrite(LED, LOW); // turn the LED off by making the voltage LOW delay(500); // wait for a second }