   const int btn3 = 8;
   const int led0 = 5;
   const int led1 = 3;
-  const int led2 = 9;
+  const int led2 = 4;
   const int led3 = 10;
 
  int btn[] = {btn0, btn1, btn2, btn3};

void loop() {
  // put your main code here, to run repeatedly:
  for (int i = 0; i < 4; i ++) {
    //if (digitalRead(btn[i] == HIGH)) {
    //  digitalWrite(led[i], HIGH);
    //}
    //else {
      digitalWrite(led[i], LOW);
    //}
      
  }
  Serial.print("Button0: ");
  Serial.print(digitalRead(btn0));
  Serial.print("   Button1: ");

 pinMode(btn1, INPUT);
 pinMode(btn2, INPUT);
 pinMode(btn3, INPUT);
 pinMode(led0, OUTPUT);
 pinMode(led1, OUTPUT);
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 
 Serial.println("Starting Program");
 
