int a=2;
int b=3;
int c=4;
int d=5;
int e=6;
int f=7;
int g=8;
void setup()
{
  pinMode(a,OUTPUT);
  pinMode(b,OUTPUT);
  pinMode(c,OUTPUT);
  pinMode(d,OUTPUT);
  pinMode(e,OUTPUT);
  pinMode(f,OUTPUT);
  pinMode(g,OUTPUT);
  Serial.begin(9600);
}
void loop()
{
  static int clk = 0;
  static int QA,qA=0,dA=0;
  static int QB,qB=0,dB=0;
  static int QC,qC=0,dC=0;
  static int QD,qD=0,dD=0;
  if(clk){
    qA = dA;
    qB = dB;
    qC = dC;
    qD = dD;
  }
  else{
    QA = qA;
    QB = qB;
    QC = qC;
    QD = qD;
  }
  dA = QA&&!QD || QB&&QC&&QD;
  dB = QB&&!QC || QB&&!QD || !QB&&QC&&QD;
  dC = QC&&!QD || !QA&&!QC&&QD;
  dD = !QD;
  Serial.print(QA);
  Serial.print(QB);
  Serial.print(QC);
  Serial.println(QD);
  
  int tempa = (!QB)&&QC || QA || QB&&QD || (!QB)&&(!QD);
  int tempb = QA || (!QB) || (!QC)&&(!QD) || QC&&QD;
  int tempc = !QC || QD || QB || QA;
  int tempd = QC&&(!QD) || (!QB)&&QC || (!QB)&&(!QD) || QB&&(!QC)&&QD;
  int tempe = QA&&QB || QA&&QC || QC&&(!QD) || (!QB)&&(!QD);
  int tempf = QA || (!QC)&&(!QD) || QB&&(!QC) || QB&&(!QD);
  int tempg = QA || QB&&(!QC) || QC&&(!QD) || (!QB)&&QC;
  
  digitalWrite(a,!tempa);
  digitalWrite(b,!tempb);
  digitalWrite(c,!tempc);
  digitalWrite(d,!tempd);
  digitalWrite(e,!tempe);
  digitalWrite(f,!tempf);
  digitalWrite(g,!tempg);
  
  delay(500);
  clk = !clk;
}