How do I combine 2 totally different codes to be one?

Question

I opened a game contest that lasts for 30 days, and I made a code to show the rules and other info, but then I did a timer that shows how much time is left until the contest ends, but I dont know how to implement the timer to the contest code. Help pls :)
Here are the two codes:
https://code.sololearn.com/WL82whLfz5Et/?ref=app
https://code.sololearn.com/WetAHx4kk9Ph/?ref=app

Answer 1

you could do it this way to merge the two HTML pages by copying the content from the second HTML page and pasting it into the first HTML page, within the body tag. You should then remove the title, head and body tags from the second HTML page, since you only need the content inside these tags.

Answer 2

ArsenicolupinIII and if the 2° code has html, css and java script, I copy each language and past it to each section on the first code?

Answer 3

Oh nvm I figured it out. Thanks!