#define delay50 100

int led[] = {25, 26, 27, 12, 13, 14, 32, 2, 4, 5,};
int num_of_leds;

void setup() {
  num_of_leds = sizeof(led) / sizeof(int);
  for (int i = 0; i < num_of_leds; i++) {
    pinMode(led[i], OUTPUT);
  }
}

void loop() {

  for (int i = 0; i < 5; i++) {pattern1();}
  for (int i = 0; i < 50; i++){pattern2();}
  for (int i = 0; i < 50; i++){pattern3();}

  delay(5000);
}

//TURN ON ALL LEDs


//OSCILLATING 3 LEDs
void pattern1() {
  for (int i = 2; i < num_of_leds; i++) {
    if (i == 2) {
      digitalWrite(led[0], HIGH);
      digitalWrite(led[1], HIGH);
    }
    digitalWrite(led[i], HIGH);
    digitalWrite(led[i - 3], LOW);
    delay(delay50);
  }
  for (int i = num_of_leds - 4; i > -1; i--) {
    digitalWrite(led[i], HIGH);
    digitalWrite(led[i + 3], LOW);
    delay(delay50);
  }
}

//RANDOM EFFECT 1
void pattern2() {
  int randomnum = random(0, num_of_leds + 1);
  digitalWrite(led[randomnum], HIGH);
  delay(delay50);
  digitalWrite(led[randomnum], LOW);
  delay(delay50);
}

//RANDOM EFFECT 2
void pattern3() {
  int randomonn = random(0, num_of_leds + 1);
  int randomoff = random(0, num_of_leds + 1);
  digitalWrite(led[randomonn], HIGH);
  digitalWrite(led[randomoff], LOW);
  delay(delay50);
}