https://www.google.com/search?q=javascript+reload+page+after+seconds
https://www.google.com/search?q=javascript+retain+variable+on+page+refresh

Head tags: <*meta http-equiv="refresh" content="10">

Where is the automatic variable xyz+1

https://www.geeksforgeeks.org/how-to-automatic-refresh-a-web-page-in-fixed-time/

<*!DOCTYPE html> <*html> <*head> <*title>Page Title <*meta http-equiv="refresh" content="10"> <*body> <*h2>Welcome To GFG <*p>The code will reload after 10s.<*/p> <*/body> <*/html> Remove * in the code