byte LED_pin[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
uint32_t previous_time[] = {0, 0, 0, 0, 0, 0, 0, 0, 0,};
uint32_t current_time[10];

void setup(){
  for (int i = 0; i<10; i++){
    pinMode(LED_pin[i], OUTPUT_2MA);
  }
}

void loop(){
  blink_10(0, 100);
  blink_10(1, 200);
  blink_10(2, 300);
  blink_10(3, 400);
  blink_10(4, 500);
  blink_10(5, 600);
  blink_10(6, 700);
  blink_10(7, 800);
  blink_10(8, 900);
  blink_10(9, 1000);
}

void blink_10(int LedPin, int interval) {
  current_time[LedPin] = millis();
  if (current_time[LedPin] - previous_time[LedPin] > interval) {
    previous_time[LedPin] = current_time[LedPin];
    digitalWrite(LedPin, !digitalRead(LedPin));
  }
}