#define led1 2
#define led2 3


void setup() {
  // put your setup code here, to run once:
 pinMode(2,OUTPUT);
 pinMode(3,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 brightled(2,500);
}
 void brightled(int pin, int delay_value){
   digitalWrite(pin, HIGH);
   delay(delay_value);
   digitalWrite(pin, LOW);
   delay(delay_value);
   
 }