void setup() {
  // put your setup code here,to run once
  pinMode(11, OUTPUT;
  pinMode(7, OUTPUT);
  pinMode(7, OUTPUT);
}
digitalWrite(7, HIGH);
void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(11, HIGH);
delay(500);

digitalWrite(11, LOW);
digitalWrite(7, HIGH);
delay(500);
digitalWrite(7, LOW);