Sort Tabs in Google Spreadsheets

sort-tabs.txt

1. Copy/Paste the information below to the clipboard
2. Open the spreadsheet whose sheets need to be alphabetised
3. Choose Tools > Script editor > Blank (this opens a new tab in the browser)
4. Press Control+A followed by Control+V copy and paste the script in
5. Press Control+S to save the script
6. Choose Run > sortSheets
7. Go back to the spreadsheet tab to view the new sorted tab order

--Copy everything below this line--
function sortSheets () {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheetNameArray = [];
  var sheets = ss.getSheets();
   
  for (var i = 0; i < sheets.length; i++) {
    sheetNameArray.push(sheets[i].getName());
  }
  
  sheetNameArray.sort();
    
  for( var j = 0; j < sheets.length; j++ ) {
    ss.setActiveSheet(ss.getSheetByName(sheetNameArray[j]));
    ss.moveActiveSheet(j + 1);
  }
}

I also am looking for a unique solution. Your alphabetizer works like a dream for me and i thought i could figure out my own solution but every example of other examples were varied in their style. I understood all of them separately, but when i tried to combine them... the downward spiral.
I currently have about 60 sheets that I'm trying to organize by:

1. The first five sheets will be in the same specific order every time. (I don't think i had any problem with that...)
2. After that I would like the Blue tabs, then Orange, then Pink and finally Red, with...
3. Each color group individually Alphabetized.

I had the first 5 sheets and two color groups working fine but i did something somewhere trying to wrap it up and destroyed al the progress i made. The more i tried to cobble it back together the worse it got until i finally realized i had spent hours just staring at the screen. I'm one of those stubborn people and I love to figure things out, but right now I'm that guy with just enough knowledge to be dangerous. I patiently await my opportunity to be guided to enlightenment.

Thank you!

anyway to sort them in descending alphabetical order?
Thank you!

Yes, should work with reverse().

sheetNameArray.sort().reverse();