First all of Thanks to Pine Team for adding Arrays to Pine!
In this script I tried to make example for
1. Finding S/R lines using highest/lowest function
2. Using 1D array as 2D (we keep S/R levels and age)
3. "Age" usage for S/R levels, getting older on each candle and changing colors by their age (maximum age is 127 then it disappears)
You can use "Close"/Open" or "High/Low" as source.
There is an option for the background color, by default it's Black, do not forget to set it accordingly :)