“systemd-boot” is it possible to customize from source code?

I am using systemd-boot from few months.. I like the simplicity and quick booting of systemd-boot.. (Image Source: https://www.maketecheasier.com/grub-vs-systemd-boot/) I am trying to change the background color from black and if possible some other things like spacing between entries.. default text “BOOT in x seconds” etc.. Is it possible to get the source code, customize,…

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