timer

unsigned long timer = 0;
unsigned long interval = 10008;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
}

void loop() {
  unsigned long dtimer = millis();
  if (dtimer - timer >= interval){
    timer = dtimer;
    }

timer = timer+dtimer;

if(timer >= interval){
  Serial.println("hej lol");
  interval += interval;
  }
  else{
    Serial.println("du grim");
    }

Serial.println(timer);
}