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Use the NonBlockingSequence library. It has clean examples for applying blinking sequences without delay. (Example Link)

Use the NonBlockingSequence library. It has clean examples for applying blinking sequences without delay. (Example Link)

    #include <NonBlockingSequence.h>


class Blinking_Led{

  private:
  // Declare Sequence
  ClassNonBlockingSequence<Blinking_Led> Sequence;

  // led pin
  byte _pin; 

  // Define step-functions
  bool led_on(){
    digitalWrite(_pin,1);
    return true;
  }
  bool led_off(){
      digitalWrite(_pin,0);
      return true;
  }

  public:
  Blinking_Led(){};  
  void init(byte pin,unsigned long pause){
    
    // define the led pin
    _pin=pin;                    
    pinMode(_pin,OUTPUT);    

    // This line explain important fact for the Sequence
    Sequence.AttachedObj(this);
    // Sequence should use steps defined inside this class only

    // Add steps
    Sequence.AddNewStep(&led_on);
    Sequence.AddDelayInMillis(pause);
    Sequence.AddNewStep(&led_off);
    Sequence.AddDelayInMillis(pause);
    Sequence.Repeat();
    // repeat the sequence infinite number of times
    
  }
  
  Blink(){ // use familiar name for led
    Sequence.DoSequence();
  }
  
};

// Declare new objects
Blinking_Led Led1;
Blinking_Led Led2;

void setup() {

  //  Led.init( pin , blinking time )
  Led1.init(13,200);
  Led2.init(12,1500);
 
}

void loop() {
  // put your main code here, to run repeatedly:
  Led1.Blink();
  Led2.Blink();
}

Use the NonBlockingSequence library. It has clean examples for applying blinking sequences without delay.

Use the NonBlockingSequence library. It has clean examples for applying blinking sequences without delay. (Example Link)

Use the NonBlockingSequence library. It has clean example codes for applying blinking sequences without delay.

Use the NonBlockingSequence library. It has clean examples for applying blinking sequences without delay.