int myPins[]={1,2,3};
int pinCount = 3;
const long period = 200;
int smer = 1;
unsigned long start_time = 0;
int trenutnaled = 0;


#define button 8


void setup() {
  Serial.begin(9600);
  for(int thisPin=0; thisPin<pinCount;thisPin++){
    pinMode(myPins[thisPin], OUTPUT);
  pinMode(button, INPUT_PULLUP);
  }

}

void loop() {
  unsigned long current_time = millis();
  if (current_time - start_time>=period){
    start_time = current_time;
    for(int thisPin=0; thisPin<pinCount;thisPin++){
    digitalWrite(myPins[thisPin], LOW);
    }
    digitalWrite(myPins[trenutnaled], HIGH);
    trenutnaled+=smer;
    if (trenutnaled==3||trenutnaled==0){
      smer=-smer;
    }
  if (digitalRead(button) == LOW && trenutnaled == 2) {
    Serial.print("Zedel");
  }
  else if (digitalRead(button) == LOW && trenutnaled != 2) {
    Serial.print("Zgresil");
  }
 }
}