int LED[8]={2,3,4,5,6,7,8,9,}
int tempo = 200;
void setup() 
{
  for(int i=0;1<8;i++)
  {
   pinMode(LED[i], OUTPUT);
  }
  Serial.begin(115200);
}

void loop() 
{
   for(int i=0;i<8;i++)
  {
   digitalWrite(LED[i], HIGH);
   delay(tempo);
   digitalWrite(LED[i], LOW);
   delay(tempo);
  
  }

   delay(10);
  
}