libGDX how to make sprite blinking x seconds

Blinker.java

public class Blinker {
  private float BLINK_TIME = 1f;
  private int BLINKING_FRAMES = 4;

  private boolean isBlinking;
  private int blinkFrameCounter;
  private float blinkTimer;

  public Blinker() {
      this.blinkTimer = 0;
      this.blinkFrameCounter = 0;
      this.isBlinking = false;
  }

  public boolean shouldBlink(float delta) {
      if (isBlinking) {
          blinkTimer += delta;
          blinkFrameCounter++;
          if (blinkTimer < BLINK_TIME) {
              if (blinkFrameCounter % BLINKING_FRAMES == 0) {
                  return true;
              }
          } else {
              blinkTimer = 0;
              isBlinking = false;
          }
      }
      return false;
  }

  public boolean isBlinking() {
      return isBlinking;
  }

  public void setBlinking(boolean isBlinking) {
      this.isBlinking = isBlinking;
  }
}

//Usage
Blinker blinker= new Blinker();
blinker.setBlinking(true);

//Add this to draw() method:
if (blinker.shouldBlink(delta))
     return;