Prettifying the bash shell

.bashrc

alias vb="VBoxManage"
alias ls='ls -GFh'

export CLICOLOR=1
export LSCOLORS=ExFxBxDxCxegedabagacad

fill="--- "
reset_style='\[\033[00m\]'
red_style='\[\033[00;31m\]'
status_style=$reset_style'\[\033[0;90m\]' # gray color; use 0;37m for lighter color
prompt_style=$reset_style
command_style=$reset_style'\[\033[1;29m\]' # bold black
# Prompt variable:
PS1="$status_style"'$fill \t\n'"$prompt_style"'${debian_chroot:+($debian_chroot)}\e[01;30m\h\e[01;36m:\e[00;34m\W \e[01;34m'"$command_style "
# Reset color for command output
# (this one is invoked every time before a command is executed):
trap 'echo -ne "\033[00m"' DEBUG
function prompt_command {
	# create a $fill of all screen width minus the time string and a space:
	let fillsize=${COLUMNS}-9
	fill=""
	while [ "$fillsize" -gt "0" ]
	do
		fill="-${fill}" # fill with underscores to work on
		let fillsize=${fillsize}-1
	done
	# If this is an xterm set the title to user@host:dir
	case "$TERM" in
		xterm*|rxvt*)
		bname=`basename "${PWD/$HOME/~}"`
		echo -ne "\n\033]0;${bname}: ${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"
		;;
		*)
		;;
	esac
}
PROMPT_COMMAND=prompt_command