#define US_0 2
#define US_1 3
#define US_2 4
#define US_3 5

/////////////Don't build the circuit without resitors guys/////////////

void binSwitch() {

  for (uint8_t UValue = 0; UValue < 16; ++UValue) {
    for (UValue = 0; UValue < 16; ++UValue) {
      digitalWrite(US_0, bitRead(UValue, 0));
      digitalWrite(US_1, bitRead(UValue, 1));
      digitalWrite(US_2, bitRead(UValue, 2));
      digitalWrite(US_3, bitRead(UValue, 3));
      Serial.print("UValue ");
      Serial.print(UValue);
      Serial.print(" = ");
      for (int8_t bit = 3; bit > -1; bit--) {
        Serial.print(bitRead(UValue, bit));
      }
      Serial.println();
      delay(500);
    }
  }
}


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println();
  pinMode(US_0, OUTPUT);
  pinMode(US_1, OUTPUT);
  pinMode(US_2, OUTPUT);
  pinMode(US_3, OUTPUT);

}



void loop() {

  binSwitch();
  delay(2000);

}