const int led=7;
const int LED=10;
void setup() {
  //put your setup code here, to run once:
pinMode(led,OUTPUT);
pinMode(LED, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(led, HIGH);
digitalWrite(LED, HIGH);
delay(2000);
digitalWrite(LED, LOW);
digitalWrite(led,LOW);
delay(2000);
}