What's wrong with this code? (adding script to store)

[faecom1]

Hi, i'm trying to get this script that I found to work on my Dawn theme to add a timer to announcement bar of my store. But it's not working. How can I fix? 

The code is from January 2023 so it might be a little outdated to work based on shopify's recent changes in last 2 years.

I would appreciate it soooo much if someone can help me figure this out!

Here's the code I'm trying: https://community.shopify.com/c/shopify-design/how-to-add-a-daily-reset-countdown-to-the-announcemen...

and i found the original code that this was taken from: https://kaniwong.github.io/2022/08/28/Add-Simple-countdown-timer-to-your-shopify-store-via-JavaScrip...