Change Plymouth Boot Splash Screen

Install Plymoth Uilities with:
yum install plymouth-utils

Install any new theme needed such as:
yum install plymouth-theme-spinfinity

List all installed themes with:
plymouth-set-default-theme --list

Change the theme with:
plymouth-set-default-theme spinfinity

Setup initdb:
/usr/libexec/plymouth/plymouth-update-initrd