How can I create a countdown mechanism using html

Question

I want to write a code that enables a clock countdown for 24hrs

Answer 1

This is a "new year" countdown example:
https://code.sololearn.com/Wt7K7MGvgG1I/#js

( need to be a few adapted to countdown for 24hours ^^ )

Answer 2

Visit this link : http://codepen.io/SitePoint/pen/MwNPVq

Answer 3

Thanks