If you want to create art, then create art. Don’t pretend that automating a script is an artistic process when it’s barely even engineering.
Hate to break it to you, but programming is creative plus I don’t like making visual art manually.
To use your numbers, 2-3 seconds at a conservative estimate of 800 watts is about half a watt-hour, roughly $0.08 on the average American electricity bill, and about 200,000 times more than the 0.0000026Wh energy cost of a 4mb download.
“A conservative estmate of 800 watts”? Where the fuck are you getting these number mate? My GPU at full power is not even half that.