void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(15, INPUT);
  pinMode(2, INPUT);
  pinMode(22, INPUT);
  pinMode(23, INPUT);
  pinMode(25, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int input1;
  int input2;
  int input3;
  int input4;
  input1=digitalRead(15);
  input2=digitalRead(2);
  input3=digitalRead(22);
  input4=digitalRead(23);
  
  if(input1==0){digitalWrite(25, LOW);}
  else if(input1==1){digitalWrite(25, HIGH);}
  

  Serial.print(input1);
  Serial.print("   ");
  Serial.print(input2);
  Serial.print("   ");
  Serial.print(input3);
  Serial.print("   ");
  Serial.println(input4);
  delay(10); // this speeds up the simulation
}