I'm new to HTML and to CARTO VL, hoping to jump right in to make a map with animated lines and points, which combined are unavailable in CARTO Builder. I've tried to run the basic CARTO VL set-up guide here: https://carto.com/developers/carto-vl/guides/getting-started/
But I can't even get this to work. I've pasted the exact code into an IDE, and then opened the .html file with a Google Chrome browser. The webpage is just blank. Is it a matter of subbing in my own API key? Or using a different IDE? Or opening the file a different way?
I think I'm missing something fundamental and obvious to programming - not sure what it is!