 const uint8_t POT_PIN = A5;
 
 
-//*** No magic numbers! Using case statements, enum will provide readable, self-documenting code for when switching modes
+//:: ***No magic numbers! Using case statements, enum will provide readable, self-documenting code for when switching modes
 enum class Mode
 {
   SETTING_TIME,


        // Erase <> selector braces
        lcd.setCursor(10, 1);
        lcdPrintFormattedSecs(countdown);
        lcd.print(F("    "));

        countdown*= (long)1000;                       //*** to save space, the ATmega328P chip of UNO uses 2-byte ints, which can hold at max 32 767; operator*(int, int) will still return an int, but in this case an overflowed int;
                                                      //*** initSetTime, a long, will just be assigned the overflowed value--it won't force operator*(int, int) to return a long.
                                                      //*** so, by typecasting 1000 or using 1000L, you make the compiler promote analogRead() to a long, so operator*(long, long) will return the expected value, within range of sizeof long
        mode = Mode::SETTING_SPEED;

                                                      //    their values persist even after function ends, as long as the program is still running
                                                      //*** also, static local variables still only have local scope
                                                      //*** perform operations with data of the same type, so as to boost performance by not needing to typecast
  static unsigned long setDuration;                     // the duration that the centrifuge should run
  static unsigned long spinningStartTime;             // point on the timeline where the countdown starts, i.e. when wpb is pressed the second time
  static uint8_t motorSpeed;

