//定义RGB色彩的输出I/Oint redPin = 11;int greenPin = 10;int bluePin = 9;//标记颜色变化的方式,增加值还是减小值bool redBool =false;bool greenBool=true;bool blueBool=false;//颜色值,初始化为0,127,255int redVal =0;int greenVal=127;int blueVal=255;void setup(){  pinMode(redPin, OUTPUT);  pinMode(greenPin, OUTPUT);  pinMode(bluePin, OUTPUT);}/** * 改变颜色的增减顺序 */void changeStatus(){   if (redVal==0)  {    redBool=true;  }  else if (redVal==255)  {    redBool=false;  }  if (greenVal==0)  {    greenBool=true;  }  else if (greenVal==255)  {    greenBool=false;  }  if (blueVal==0)  {    blueBool=true;  }  else if (blueVal==255)  {    blueBool=false;  }  }/** * 改变颜色的变化量,增加还是减少 */void changeColorVal(){    if (redBool)  {    redVal++;  }  else  {    redVal--;  }  if (greenBool)  {    greenVal++;  }  else  {    greenVal--;  }  if (blueBool)  {    blueVal++;  }  else  {    blueVal--;  }}/** * 设置led灯颜色 */void setColor(int red, int green, int blue){  analogWrite(redPin, red);  analogWrite(greenPin, green);  analogWrite(bluePin, blue);}void loop(){  //更新颜色变化状态  changeStatus();  //更新颜色值  changeColorVal();  //设置颜色  setColor(redVal, greenVal, blueVal);  delay(50);}