the "dark version" is meant to be used with a dark background.
You'll need to decide which background you want to use, light or dark, and then use the correct version of the software
Dark version for dark screens - https://www.tradingview.com/script/A...ey-Math-Lines/
Light version for...you guessed it...lightscreens - https://www.tradingview.com/script/R...h-Lines-Alain/
As you were struggling to see the lines on the dark version, I'd recommend you use the light version
4