I'm new to programming and using Arduino products, and was wondering if someone wouldn't mind assisting me with a project I'm trying to tackle?

If you review my code below, I have 3 conditions within my "idle" case, and the program is constantly looking for any of those 3 conditions. If the first condition is met, then case 1 is called; if the second condition is met, then case 2 is called; if the third condition is met, then case 3 is called. All 3 cases return to the "idle" case once done running.

What I would like to do is find some way to insert the "warning" case if any of the conditions are met, BEFORE going to case 1, case 2 or case 3, without writing the functions of the "warning" case over each time for each of the other 3 cases. Essentially, the flow would be like this:

condition 1 --> warning --> case 1 --> case idle;

condition 2 --> warning --> case 2 --> case idle;

condition 3 --> warning --> case 3 --> case idle:

void loop() {
  static byte theState = idle;


  switch (theState)
  {


// Idle

    case idle:
      if (voltageA0 > 1.0) {
        theState = case1;
      }

      if (voltageA1 < 2.0) {
        theState = case2;
      }

      if (voltageA2 > 3.5) {
        theState = case3;
      }
     
      break;


// Warning

    case warning:
      digitalWrite(7, HIGH);
      delay(5000);
      digitalWrite(7, LOW);
      delay(0);
      break;


// Case 1 

    case 1:
      digitalWrite(8, HIGH);
      delay(2000);
      digitalWrite(8, LOW);
      delay(0);
      theState = idle;
      break;


// Case 2

    case 2:
      digitalWrite(9, HIGH);
      delay(2000);
      digitalWrite(9, LOW);
      delay(0);
      theState = idle;
      break;


// Case 3

    case 3:
      digitalWrite(10, HIGH);
      delay(2000);
      digitalWrite(10, LOW);
      delay(0);
      theState = idle;
      break;

  }
}

Also, if there is a more efficient way to do this, code-wise, I'm all ears! Any assistance with this would be hugely appreciated!! :)

Thanks,

Andrew