Don't know about you guys, but most people use dark themes because they strain their eyes with the light themes.
But the problem is not the theme, because you shouldn't get eye strain with a light theme. The real problem is that the monitor is set way too bright. Like a lot. Monitor brightness should be about equal to the ambient light level. Bright monitors make for punchy images but horrible ergonomics.
Anyway, you couldn't really do any serious applications with gwbasic. It was followed by qbasic a little later.
I was in time to get to do both. Still have the original GWBASIC manuals!
I just did a little with both. But this was around the same time that Borland released Turbo Pascal and at least in my view it became the serious language to make PC applications with in that era. It was almost instant compilation and it had a very good IDE.
That's a start. So that still leaves you with dozens of language choices like Perl, Python, F#, Ruby and more. But 99% of the time the site that is ASP.NET will be built with C# or VB.NET. So you'll need to look at the code to determine which one, but C# looks like Java and VB.NET looks like it was written by a little kid, so they are pretty easy to tell apart ;) No seriously, they look nothing alike, so it's normally super easy to tell.