Hi Bill,
I'm not experienced enough to modify a code that much.
I only started with Arduino and coding a few months ago.
Right now I find a code that does what I want (or almost)
and then I try to modify it for my needs.
The code I have now. The percent and the progress bar
are increasing with the distance between the sensor and
the object.
Since my project is to show the level of water in a tank,
bigger the distance mean lower the water so I need to
reverse the value so the percent and progress bar will
decrease while the distance increase.
I started that project two days ago so I'm still looking.