int redPin = 11;
int greenPin = 10;
int bluePin = 9;

unsigned long curTime = 0;


unsigned long redPre = 0;

int redTime  = 200;

int redState = LOW;


unsigned long greenPre = 0;

int greenTime  = 500;

int greenState = LOW;


unsigned long bluePre = 0;

int blueTime  = 300;

int blueState = LOW;



void setup() {

  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

}

void loop() {
  
  curTime  = millis();

 if(curTime-redPre>= redTime) {

    redPre = curTime;

    if (redState == LOW) {
      redState = HIGH;
      redTime= 2000;
    } else {
      redState = LOW;
      redTime = 500;
    }

   
    digitalWrite(redPin, redState);
  }

   if(curTime-greenPre>= greenTime) {

    greenPre = curTime;

    if (greenState == LOW) {
      greenState = HIGH;
    } else {
      greenState = LOW;
    }

   
    digitalWrite(greenPin, greenState);
  }


 if(curTime-bluePre>= blueTime) {

    bluePre = curTime;

    if (blueState == LOW) {
      blueState = HIGH;
    } else {
      blueState = LOW;
    }

   
    digitalWrite(bluePin, blueState);
  }
}