A Matrix theme for rEFInd.
Clone this repository into a themes directory located inside the refind EFI directory
(usually /boot/EFI/refind)
Then add include themes/Matrix-rEFInd/theme.conf at the end of the refind.conf.
To hide unwanted options simply press delete while the icon is selected. To restore hidden icons use the lower right button.
The original image can be found here: https://i.imgur.com/c1Z62Q2.jpg.
The icons can be found here: https://github.com/SLywnow/hi-themes-refind.