4 LED BLINK PIN 9,10,11,12

void setup() {
  // initialse digital pin 13 as a output:
pinMode(12,OUTPUT);
pinMode(11,OUTPUT);
pinMode(10,OUTPUT);
pinMode(9,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(12,HIGH);
digitalWrite(11,HIGH);
digitalWrite(10,HIGH);
digitalWrite(9,HIGH);
delay(200);
digitalWrite(12,LOW);
digitalWrite(11,LOW);
digitalWrite(10,LOW);
digitalWrite(9,LOW);
delay(100);
}