#define INPUT_1 73
#define INPUT_2 74

void setup() {
  pinMode(GREEN_LED, OUTPUT); 
  pinMode(BLUE_LED, OUTPUT);
  pinMode(INPUT_2, INPUT);
  
  digitalWrite(GREEN_LED , LOW);
  digitalWrite(BLUE_LED  , LOW);
}

void loop() {

  if (digitalRead(INPUT_2) == HIGH) {
    digitalWrite(GREEN_LED   , LOW);
    digitalWrite(BLUE_LED   , HIGH);
  } else {
    digitalWrite(GREEN_LED   , HIGH);
    digitalWrite(BLUE_LED   , LOW);
  }

}