How to loop through comma separated string in batch?

Question

Windows

Based on the post (dos batch iterate through a delimited string), I wrote a script below but not working as expected.

Goal: Given st

Answer 1

I took Aacini's answer and only slightly modified it to remove the quotes, so that the quotes can be added or removed as it would be in the desired command.

@echo off
set themes=Hot Sun,Hard Granite,Shimmering Bright Twilight
for %%a in ("%themes:,=" "%") do (
    echo %%~a
)