Collision Avoidance Vehicle

Projects General Guidance
8

So thought I'd try and simplify things a bit to try and experiment using timers as a delay to blink an LED for now. However, not working at the moment...this is where I'm at..

unsigned long previousMillis;
unsigned long starttimer;
unsigned long endtimer;
unsigned long present;
long interval = 1000;

void setup()
{
  Serial.begin (9600);
  pinMode(13, OUTPUT);
}
 void loop(){
   
  present = millis();
  Serial.print("present:  ");
  Serial.println(present);
  starttimer = millis();
  Serial.print("starttimer:  ");
  Serial.println(starttimer);
  endtimer = starttimer + interval;
  if (endtimer < present)
  {
    digitalWrite (13, HIGH);
  }
  digitalWrite(13, LOW);
 }