//int timer = 100;           // The higher the number, the slower the timing.
int ledPin[] = {  2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,};       // an array of pin numbers to which LEDs are attached
int pinCount = 11;           // the number of pins (i.e. the length of the array)



int timer = 1000;           // The higher the number, the slower the timing.
int LedPins[] = { 17, 14, 15, 16 };     // an array of pin numbers to which LEDs are attached
//int pinCount = 4;           // the number of pins (i.e. the length of the array)

void setup() {
  // the array elements are numbered from 0 to (pinCount - 1).
  // use a for loop to initialize each pin as an output:

  for (int analogpins = 0; analogpins < 4; analogpins++)
   {
    pinMode(LedPins[analogpins], OUTPUT);
  }
}

void loop() {
  // loop from the lowest pin to the highest:
  for (int analogpins = 0; analogpins < 4; analogpins++)
  {
    // turn the pin on:
    digitalWrite(LedPins[analogpins], HIGH);
    delay(timer);
    // turn the pin off:
    digitalWrite(LedPins[analogpins], LOW);
  }

}