/* A simple program to sequentially turn on and turn off 3 LEDs */ int LED1 = 13; int LED2 = 12; int LED3 = 11; void setup() { pinMode(LED1, OUTPUT); pinMode(LED2, OUTPUT); pinMode(LED3, OUTPUT); } void loop() { digitalWrite(LED1, HIGH); // turn on LED1 delay(200); // wait for 200ms digitalWrite(LED1, LOW); // turn off LED1 delay(100); digitalWrite(LED2, HIGH); // turn on LED2 delay(200); // wait for 200ms digitalWrite(LED2, LOW); // turn off LED2 delay(100); digitalWrite(LED3, HIGH); // turn on LED3 delay(200); // wait for 300ms // wait for 300ms digitalWrite(LED3, LOW); // turn off LED3 delay(100); // wait for 300ms before running program all over again }