#define LED1 2
#define LED2 3
#define LED3 4
#define LED4 5
#define LED5 6


uint8_t pins[] = {LED1,LED2,LED3,LED4,LED5};
//const uint8_t pins[] PROGMEM = {LED1,LED2,LED3,LED4,LED5};


void setup() {
Serial.begin(115200);
//for(auto l: pins)pinMode(l, OUTPUT);
for(const auto &l: pins)pinMode(l, OUTPUT);
}

void loop() {
  static uint8_t ol = LED1;
  for(const auto &l: pins){
    digitalWrite(ol,LOW);
    delay(30);
    digitalWrite(l,HIGH);
    ol = l;
    delay(50);
  }
 /*
  for(auto l: pins){
    digitalWrite(l,LOW);
    delay(50);
  }
  */
}