Grub customization

i am using ver 4.16.0-parrot5.
architecture version: amd64
i tried to customize my grub bootloader using grub customizer but it didin’t work. I want the set of commands to successfully customize my grub.

4.16.0-parrot5 is not the oarrot version, it is the linux kernel version which has nothing to do with the parrot versioning policy