int red_led = 11;
int green_led = 10;
int blue_led = 9;

unsigned long timeRed = millis();
unsigned long timeGreen = millis();
unsigned long timeBlue = millis();

unsigned long globalTime = millis();

void setup() {
  pinMode(red_led, OUTPUT);
  pinMode(green_led, OUTPUT);
  pinMode(blue_led, OUTPUT);
}



void loop() {
  if((millis() - timeRed) < 1000){
    digitalWrite(red_led, HIGH);
  }else{
    digitalWrite(red_led, LOW);
  }
  if((millis() - timeRed) > 2000){
    timeRed = millis();
  }

  if((millis() - timeBlue) < 2000){
    digitalWrite(blue_led, HIGH);
  }else{
    digitalWrite(blue_led, LOW);
  }
  if((millis() - timeBlue) > 4000){
    timeBlue = millis();
  }

  if((millis() - timeGreen) < 3000){
    digitalWrite(green_led, HIGH);
  }else{
    digitalWrite(green_led, LOW);
  }
  if((millis() - timeGreen) > 6000){
    timeGreen = millis();
  }

}