const int LED_pins[8] = {PA3, PA5, PA6, PA7, PA8, PA9, PA10, PA15};
int k2000Animation[][8] = {
  {0b00000000},
  {0b10000001},
  {0b11000011},
  {0b11100111},
  {0b11111111},
  {0b01111110},
  {0b00111100},
  {0b00011000}
};
void setup() {
  for (int i = 0; i < 8; ++i) {
    pinMode(LED_pins[i], OUTPUT);
  }
}
void loop() {
  int steps = sizeof(k2000Animation) / sizeof(k2000Animation[0]);

  for (int i = 0; i < steps; ++i) {
    int pattern = k2000Animation[i][0];
    digitalWriteAll(pattern);
    delay(200);
  }
}
void digitalWriteAll(int pattern) {
  for (int i = 0; i < 8; ++i) {
    digitalWrite(LED_pins[i], (pattern >> i) & 1);
  }
}