This is a custom theme for your os boot.
The following commands works in ubuntu derivated distros... if dont work it please make a search on google.
copy the loadlinux2 folder to usr/share/plymouth/themes
open the terminal and run the following commands
sudo ln -sf /usr/share/plymouth/themes/loadlinux2/loadlinux2.plymouth /etc/alternatives/default.plymouth
sudo update-initramfs -u