Raspbian PIXEL on Debian Buster

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# this is for sources.list                                                      #
# deb http://ftp.debian.org/debian/ stretch main contrib non-free               #
# deb http://security.debian.org/debian/ stretch/updates main contrib non-free  #
# deb http://ftp.debian.org/debian/ stretch-updates main contrib non-free       #
# (OPTIONAL: optional if you have stretch)                                      #
#################################################################################
## Create a file in /etc/apt/sources.list.d/ named raspi.list ##

put this first --> deb [trusted=yes] http://archive.raspberrypi.org/debian/ buster main ui

## do sudo apt update then sudo apt-get update and sudo apt-get dist-upgrade ##

change the raspi.list to:

this --> deb [trusted=yes] http://archive.raspberrypi.org/debian/ stretch main ui

## do sudo apt update then sudo apt-get install raspberrypi-ui-mods ##