int led1Pin=D0;
int led2Pin=D1;
int led3Pin=D2;
int led4Pin=D3;
void setup()
{
  pinMode(led1Pin,OUTPUT);
  pinMode(led2Pin,OUTPUT);
  pinMode(led3Pin,OUTPUT);
  pinMode(led4Pin,OUTPUT);
}
void loop()
{
  digitalWrite(led1Pin,HIGH);
  digitalWrite(led2Pin,HIGH);
  digitalWrite(led3Pin,HIGH);
  digitalWrite(led4Pin,HIGH);
  delay(1000);
  digitalWrite(led1Pin,HIGH);
  digitalWrite(led2Pin,HIGH);
  digitalWrite(led3Pin,LOW);
  digitalWrite(led4Pin,LOW);
  delay(1000);
}