Simple Bollinger Band Width Percentile

I'm a big fan of The_Caretaker's BBWP and wanted to add it as a volatility indicator to some of my scripts, but since it is over 100 lines of code (plus spacing and comments) I wanted to find if there was a simpler way to get comparable results. SBBWP uses Pine 5 built in functions that I don't believe were available when The_Caretaker wrote BBPW. The main limitations compared to The_Caretaker's version is that it can only use SMA as its Basis Type and the colors are also not as pretty. I have not included alerts or scale lines since I'm not trying to replace BBWP, just give a simple example that you can easily build in to your scripts.

Full credit and respect to The_Caretaker!