int pin = 0;
int myPattern1[4] = {1,0,0,1};     
int myPattern2[4] = {0,1,1,0}; 


void setup() {

  Serial.begin(115200);
  pinMode(0, OUTPUT);    // sets the digital pin as output
  pinMode(1, OUTPUT); 
  pinMode(2, OUTPUT); 
  pinMode(3, OUTPUT); 
}

void loop() {
   

  for (int i = 0; i <= 3; i++) {

    digitalWrite(i,myPattern1[i]);
    delay(500);
    digitalWrite(i,myPattern2[i]);
    delay(500);
    

  }

 }