Original AUTHOR: vinceliuice
AUTHOR: EndeavourOS-team
git clone repo, cd into it and build and install using makepkg:
git clone https://github.com/EndeavourOS-Community-Editions/grub2-theme-endeavouros-classic.git
cd grub2-theme-endeavouros-classic
makepkg -si
To make it used:
GRUB_THEME="/boot/grub/themes/EndeavourOS/theme.txt"
sudo grub-mkconfig -o /boot/grub/grub.cfg