#define flash4 digitalWrite(0, HIGH); delay(100); digitalWrite(0, LOW); delay(100); digitalWrite(0, HIGH); delay(100); digitalWrite(0, LOW); delay(250);
digitalWrite(1, HIGH);
delay(100);
digitalWrite(1, LOW);
delay(100);
digitalWrite(1, HIGH);
delay(100);
digitalWrite(1, LOW);
delay(250); ;

void setup()

{

  pinMode(0, OUTPUT);

  pinMode(1, OUTPUT);

}


void loop()

{
  flash4
}