// EXAMPLE 01 : Blinking LED const int LED = 7; // digital pin 7 for LED void setup() { pinMode(LED, OUTPUT); // set LED pin as OUTPUT } void loop() { digitalWrite(LED, HIGH); // LED, ON delay(1000); // wait for 1 second digitalWrite(LED, LOW); // LED, OFF delay(1000); // wait for 1 second // digitalWrite(LED, HIGH); // LED, ON // delay(0); // wait for 1 second // digitalWrite(LED, LOW); // LED, OFF // delay(0); // wait for 1 second }