M-x butterfly
It started with a post on Emacs Stories Telegram group.
Someone posted a pretty picture with Emacs-logo-on-a-butterfly and a comment M-x butterfly
But the actual command M-x butterfly is boring (to me at least)
I wanted the nice image.
Some nice soul on the group directed me to this page
First I changed the icon of my doom emacs to this image.
I followed these instructions.
No immediate success.
Because, I have Emacs installed from brew, so one in /Applications folder is a symlink to the actual file in /opt/..