int pin1 = 12;

void setup() {
  // put your setup code here, to run once:
pinMode(pin1, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
// analogWrite(pin1,255);
// delay(1000);
// analogWrite(pin1,250);
// delay(100);
// analogWrite(pin1,200);
// delay(100);
// analogWrite(pin1,150);
// delay(100);
// analogWrite(pin1,100);
// delay(100);
analogWrite(pin1,127);   // (255 % 2) == 127.5  //
delay(1000);
analogWrite(pin1,128);
delay(1000);
}