int i = 0;
int durum = 0;
void setup() {
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop() {
  if (i > 50) {
    i = 0;
  }
  durum = (i + 1) % 3;

  switch (durum) {
    case 0:
      anime1();
      break;
    case 1:
      anime2();
      break;
    case 2:
      anime3();
      break;
  }
}

void anime1() {
  digitalWrite(12, HIGH);
  digitalWrite(11, LOW);
  delay(100);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(100);
  i++;
}

void anime2() {
  for (int i = 0; i < 3; i++) {
    digitalWrite(12, HIGH);
    delay(100);
    digitalWrite(12, LOW);
    delay(100);
  }
  delay(250);
  for (int i = 0; i < 3; i++) {
    digitalWrite(11, HIGH);
    delay(100);
    digitalWrite(11, LOW);
    delay(100);
  }
  delay(250);
  i++;
}

void anime3() {
  for (int j = 0; j < 5; j++) {
    for (int i = 0; i < 255; i += 5) {
      analogWrite(12, i);
      analogWrite(11, (255 - i));
      delay(100);
    }
    delay(250);
    i++;
  }
}