on this live preview at the bottom of the page where is the select list "fav sport" the background changes according to the sport selected but the background takes time to load which causes a white color to show up for some time
How can I preload images so that white color-shifting doesn't appear
here's the file link in the repo

PS: I'm really sorry for how poorly the code was written but it was back then when I was still seeing if programming is for me or not
feel free to include the script, styles in the markup file so that you don't get a headache by the project bad structure
I'd be really thankful for anyone helping, thx in advance