/*
int led = 7;

void setup() {
  pinMode(led, OUTPUT);
}

void loop() {
  digitalWrite(led, HIGH);
  delay(500);
  digitalWrite(led, LOW);
  delay(500);
}
*/

int led = 7;
unsigned long cas;
int zakasnitev = 500;
bool m = HIGH;

void setup() {
  pinMode(led, OUTPUT);
  Serial.begin(115200);
}

void loop() {
  if ((millis() - cas) > zakasnitev){
    cas = millis();
    m = !m;
    Serial.println(m);
    digitalWrite(led, m);
  }
}