Countdown timer using Experimental Code

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I’m creating Glide Apps.
Every time I follow the movie, Countdown timer doesn’t appear.

Custom countdown - Custom Code - Glide Community (glideapps.com)

I want to know what kind of formula I should enter "Data*2"column, shown on the first image.
Also, I can’t understand which component is used, shown on the second image.

fine1
fine11920×1080 105 KB

fine3
fine31920×1080 105 KB

Link to use:

https://thinhdinhlca.github.io/custom-countdown/