//Definitions
int Q0_0=12;  //Read pins
int Q0_1=11;  //Q0 is least significant chip
int Q0_2=10;  //Q1 is most significant chip
int Q0_3=9;
int Q1_0=8;
int Q1_1=7;
int Q1_2=6;
int Q1_3=5;

int rb0=0;  //Read bits
int rb1=0;
int rb2=0;
int rb3=0;
int rb4=0;
int rb5=0;
int rb6=0;
int rb7=0;

int clock=13;  //Clock pin is LED pin
int count=0;

void setup() {                
  Serial.begin(9600);
  pinMode(13, OUTPUT);
  pinMode(12, INPUT);    
  pinMode(11, INPUT);
  pinMode(10, INPUT);
  pinMode(9, INPUT);
  pinMode(8, INPUT);
  pinMode(7, INPUT);
  pinMode(6, INPUT);
  pinMode(5, INPUT); 
}

void loop() {
  rb0=digitalRead(Q0_0);  //Reads the counters' bits
  rb1=digitalRead(Q0_1); 
  rb2=digitalRead(Q0_2); 
  rb3=digitalRead(Q0_3); 
  rb4=digitalRead(Q1_0);
  rb5=digitalRead(Q1_1); 
  rb6=digitalRead(Q1_2); 
  rb7=digitalRead(Q1_3);
  
  count= rb0 + 2*rb1 + 4*rb2 + 8*rb3  //Converts the bits to decimal
  + 16*rb4 + 32*rb5 + 64*rb6 + 128*rb7;

  Serial.println(count);  //Prints count to serial monitor
  digitalWrite(clock,HIGH);  //Clock pulse advances count by one
  delay(3);
  digitalWrite(clock,LOW);
  delay(500);  //Slows the Arduino
}