int inputa = 4;
int inputb = 5;
int inputc = 6;
void setup() {
  pinMode(inputa,OUTPUT);
  pinMode(inputb,OUTPUT);
  pinMode(inputc,OUTPUT);
Serial.begin(9600);
}
void gen(int a,int b, int c){
  Serial.println("GEN("+String(a)+":"+String(b)+":"+String(c)+")");
  if (a == 0){digitalWrite(inputa, LOW);}
  else {digitalWrite(inputa, HIGH);}
  if (b == 0){digitalWrite(inputb, LOW);}
  else {digitalWrite(inputb, HIGH);}
  if (c == 0){digitalWrite(inputc, LOW);}
  else {digitalWrite(inputc, HIGH);}
  delay(2000);
}

void loop() {
 gen(0,0,0);
 gen(0,0,1);
 gen(0,1,0);
 gen(0,1,1);
 gen(1,0,0);
 gen(1,0,1);
 gen(1,1,0);
 gen(1,1,1);
}