/* Program 1-2: Toggling yellow LED on an Arduino board
  */
const int Yellow_LED = 13;         /* Yellow LED */

void setup() {
    pinMode(Yellow_LED, OUTPUT);   /* set Yellow LED pin as output */
}
void loop() {
    digitalWrite(Yellow_LED,HIGH); /* turn on the Yellow LED */
    delay(750);                 /* delay 750 ms */
    digitalWrite(Yellow_LED,LOW);  /* turn off the Yellow LED */
    delay(750);                 /* delay 750 ms */
}