void setup() {
pinMode(1,OUTPUT);
pinMode(3,OUTPUT);
pinMode(5,OUTPUT);
pinMode(7,OUTPUT);
  
}

void loop() {
digitalWrite(1, HIGH);
digitalWrite(3, HIGH);
digitalWrite(5, HIGH);
digitalWrite(7, HIGH);
delay(1000);
digitalWrite(1, LOW);
digitalWrite(3, LOW);
digitalWrite(5, LOW);
digitalWrite(7, LOW);
delay(1000);
}