// here's my blinky program, improved with a for loop
// turns on light 2, 3, 4, 5 in sequence.
// by mr. jamie

void setup() {

  for (int i = 2; i <= 5 ; i++) {
    pinMode(i, OUTPUT);
  }
  
}

void loop() {

  int dtime = 250 ;
 
  for (int i = 2 ; i <= 5 ; i++) {
    digitalWrite(i, HIGH);
    delay(dtime);
    digitalWrite(i, LOW);
  }
  
}