const int LEDPin = 13;
const int LED2Pin = 12;
const int LED3Pin = 11;
const int LED4Pin = 10;
void setup() {
  // put your setup code here, to run once:
  pinMode(13,OUTPUT);
  pinMode(12,OUTPUT);
  pinMode(11,OUTPUT);
  pinMode(10,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(i,HIGH);
  delay(100);
  digitalWrite(i,LOW);
  delay(100);
}