const int blue_led = 12;
const int green_led = 9;
const int yellow_led = 6;
const int red_led = 3;     

const int yes = 600;
const int no = 500;
const int crisnaldi = 250;
const int kepin = 150;

void setup() {
  // put your setup code here, to run once:
pinMode(blue_led, OUTPUT);
pinMode(green_led, OUTPUT);
pinMode(yellow_led, OUTPUT);
pinMode(red_led, OUTPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(12, HIGH);
digitalWrite(9, LOW);
digitalWrite(6, LOW);
digitalWrite(3, LOW);
delay(yes);

digitalWrite(12, LOW);
digitalWrite(9, HIGH);
digitalWrite(6, LOW);
digitalWrite(3, LOW);
delay(no);

digitalWrite(12, LOW);
digitalWrite(9, LOW);
digitalWrite(6, HIGH);
digitalWrite(3, LOW);
delay(crisnaldi);

digitalWrite(12, LOW);
digitalWrite(9, LOW);
digitalWrite(6, LOW);
digitalWrite(3, HIGH);
delay(kepin);

}