$ cd /usr/share/plymouth/themes/
$ sudo git clone https://github.com/tech-alchemist/plymouth.pratap.git pratap
$ sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/pratap/pratap.plymouth 100
$ sudo update-alternatives --config default.plymouth
& Type selection number of pratap & Enter
$ sudo update-initramfs -u
Now reboot.
$ sudo update-alternatives --remove default.plymouth /usr/share/plymouth/themes/pratap/pratap.plymouth