void setup() {
  pinMode(12,OUTPUT);
}
void loop() {
 digitalWrite(12,LOW);
 delay(500);
}


Active Low and ActiveHigh .ino

diagram.json

void setup()
{
pinMode(13, INPUT);
pinMode(5, INPUT);
pinMode(23, INPUT);
pinMode(25, OUTPUT);
pinMode(26, OUTPUT);
pinMode(27, OUTPUT);
}
void loop()
{
if(digitalRead(13)==LOW)
   digitalWrite(25,HIGH);
else
 digitalWrite(25,LOW);
if(digitalRead(5)==LOW)
   digitalWrite(26,HIGH);
else
 digitalWrite(26,LOW);
 if(digitalRead(23)==LOW)
   digitalWrite(27,HIGH);
else
 digitalWrite(27,LOW);
}