how to make a flasher to the led during the motor is running

Using Arduino Project Guidance
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AT line 94 in the code i want to make a flasher to the led during the motor is running at opening condition , please can i get a help ?!

limiitswitchtest22.ino (5.95 KB)

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This loop is executing while your motor is running:

      while (digitalRead(limswitch) == LOW);  // Wait for limit switch to trigger (may need HIGH instead of LOW)

You can put the "BlinkWithoutDelay" blink code in the loop:

      while (digitalRead(limswitch) == LOW) {  // Wait for limit switch to trigger (may need HIGH instead of LOW)
  // From the BlinkWithoutDelay example
  unsigned long currentMillis = millis();
  if(currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED 
    previousMillis = currentMillis;   
    // if the LED is off turn it on and vice-versa:
    ledState = !ledState;
    digitalWrite(ledPin, ledState);
  }
    }
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