// constants won't change. They're used here to
// set pin numbers:
const int buttonPinA = A0;    
const int ledPinA =  11;
const int buttonPinB = A1;    
const int ledPinB =  10;      
const int buttonPinC = A2;    
const int ledPinC =  9;  
const int buttonPinD = A3;    
const int ledPinD =  6;
const int buttonPinE = A4;    
const int ledPinE =  5;      
const int buttonPinF = A5;    
const int ledPinF =  3;  

// variables will change:
int buttonStateA = 0;
int buttonStateB = 0;
int buttonStateC = 0;
int buttonStateD = 0;
int buttonStateE = 0;
int buttonStateF = 0;

void setup() {
  pinMode(ledPinA, OUTPUT);
  pinMode(buttonPinA, INPUT);
  pinMode(ledPinB, OUTPUT);
  pinMode(buttonPinB, INPUT);
  pinMode(ledPinC, OUTPUT);
  pinMode(buttonPinC, INPUT);
  pinMode(ledPinD, OUTPUT);
  pinMode(buttonPinD, INPUT);
  pinMode(ledPinE, OUTPUT);
  pinMode(buttonPinE, INPUT);
  pinMode(ledPinF, OUTPUT);
  pinMode(buttonPinF, INPUT);
}

void loop() {
  // read the state of the pushbutton value:
  buttonStateA = digitalRead(buttonPinA);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonStateA == HIGH) {
    // turn LED on:
    digitalWrite(ledPinA, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPinA, LOW);
  }  

  // read the state of the pushbutton value:
  buttonStateB = digitalRead(buttonPinB);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonStateB == HIGH) {
    // turn LED on:
    digitalWrite(ledPinB, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPinB, LOW);
  }  

  // read the state of the pushbutton value:
  buttonStateC = digitalRead(buttonPinC);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonStateC == HIGH) {
    // turn LED on:
    digitalWrite(ledPinC, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPinC, LOW);
  }  

  // read the state of the pushbutton value:
  buttonStateD = digitalRead(buttonPinD);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonStateD == HIGH) {
    // turn LED on:
    digitalWrite(ledPinD, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPinD, LOW);
  }  

  // read the state of the pushbutton value:
  buttonStateE = digitalRead(buttonPinE);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonStateE == HIGH) {
    // turn LED on:
    digitalWrite(ledPinE, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPinE, LOW);
  }  

  // read the state of the pushbutton value:
  buttonStateF = digitalRead(buttonPinF);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonStateF == HIGH) {
    // turn LED on:
    digitalWrite(ledPinF, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPinF, LOW);
  }    
  
}