int crvena = 9;
int zelena = 10;
int sina = 11;


void setup() {
 Serial.begin(9600);
 pinMode(crvena, OUTPUT);
 pinMode(zelena, OUTPUT);
 pinMode(sina, OUTPUT);
}

void loop() {
digitalWrite(crvena, LOW); 
digitalWrite(zelena, HIGH);
digitalWrite(sina, HIGH);

digitalWrite(crvena, HIGH);
digitalWrite(zelena, LOW);
digitalWrite(sina, HIGH);

digitalWrite(crvena, HIGH);
digitalWrite(zelena, HIGH);
digitalWrite(sina, LOW);




digitalWrite(crvena, LOW); 
digitalWrite(zelena, LOW);
digitalWrite(sina, HIGH);

digitalWrite(crvena, HIGH);
digitalWrite(zelena, LOW);
digitalWrite(sina, LOW);

digitalWrite(crvena, LOW);
digitalWrite(zelena, HIGH);
digitalWrite(sina, LOW);





}