int i=2;
void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);pinMode(6, OUTPUT);
}
void loop()
{
  
for(;i<7;i++){
  
digitalWrite(i, HIGH);
delay(1000);
digitalWrite(i,LOW);
delay(1000);

}

}