Looking for a fake generator script

[tuber12]

I'm looking if there are some scripts available to buy which will act like fake generators, similar to this one: https://gehack.com/gen/piano-tiles-TM/848160327?

I have some really basic knowledge of PHP but I'm not sure how to build this.
I believe that I should start with a progress bar and probably make everything else based on it.
Maybe something like this: https://github.com/w3shaman/php-progress-bar

Any resources I might check to build this by myself, or if there are some cheap scripts already done I would buy it...