What magic is this?

file: https://3gt547.axshare.com/

With the axure file above opened, will you see a rectengle with automatically updating time string in it. However, NOT even one INTERACTION could be found in this prototype.

Anyone knows how to make this magic happen?

I can make this with dynamic panel, but the time in it was merely just a rectengle, nothing more.

case closed, thanks to the console …