I assume the echoecho is not your site?
Here is a working demonstration: META Autopage presentation.web; this is a 14 page site that will refresh each page every five seconds and will cycle back through to the start form the last slide.
You should give each page a meaningful name and not rely on index, index-a, ...
If the first page is index then you use filename.htm.
If the first page is index.html, you use filename.html.
The META statements were put in the Page's HTML code head.
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