int pin[] = {3,4,5,6};

int number = 5;

int count(int num){
  int d=num%2;
  int c=d%2;
  int b=c%2;
  int a=b%2 ;
  int result[]= {a,b,c,d};
  return result;
  }
  
/*result(int a,int b,int c,int d){
  if (a=0){
    digitalWrite(pin[0], HIGH);}
  if (b=0){
    digitalWrite(pin[1], HIGH);}
  if (c=0){
    digitalWrite(pin[2], HIGH);}
  if (d=0){
    digitalWrite(pin[3], HIGH);}
  }*/
 


void setup() {
  // put your setup code here, to run once:
  for (int i=0;i<10;i++){
    pinMode(pin[i], OUTPUT);}
}

void loop() {
  // put your main code here, to run repeatedly:
  int x[]={count(number)};
  int a=x[0];
  int b=x[1];
  int c=x[2];
  int d=x[3];
  if (a=1){
    digitalWrite(pin[0], HIGH);}
  if (b=1){
    digitalWrite(pin[1], HIGH);}
  if (c=1){
    digitalWrite(pin[2], HIGH);}
  if (d=1){
    digitalWrite(pin[3], HIGH);}


  /*for (int i=0;i<10;i++){
    digitalWrite(pin[i], HIGH);
    delay(500);
    digitalWrite(pin[i], LOW);
    delay(500);
}*/
}