int raudona = 3;
int geltona = 2;
//int laikas = 100;
int i = 100;

void setup() 
{
pinMode(2, OUTPUT); 
pinMode(3, OUTPUT); // put your setup code here, to run once:
}

void ijunkLemp(int laikas = 1000) 
{
  digitalWrite(geltona, LOW);
  digitalWrite(raudona, HIGH);
  delay(laikas);
  digitalWrite(geltona, HIGH);
  digitalWrite(raudona, LOW);
  delay(laikas);
}

void loop () {
  ijunkLemp(i);
  i = i + 1;
}