呼吸燈

 void setup() {

  // put your setup code here, to run once:

pinMode(3,OUTPUT);

}

void loop() {

  // put your main code here, to run repeatedly:

  for(int i=0;i<=255;i++)//呼吸燈slow變亮

  {

    analogWrite(3,i);

    delay(10);

  }

  for(int i=255;i>=0;i--)//呼吸燈slow變暗

  {

    analogWrite(3,i);

    delay(10);

  }

}