My command prompt

.bashrc

# first line:
# ===========
# user/host (red if root, white if not)
# number of files in the current directory
# total size of files in current directory

# second line:
# ============
# green benzene symbol if previous command succeeded
# solid red hexagon if previous command failed
# this requires unicode support to work - if the terminal doesn't support unicode, it'll use green and red diamonds instead

BLACK='\e[0;30m'
BLUE='\e[0;34m'
GREEN='\e[0;32m'
CYAN='\e[0;36m'
RED='\e[0;31m'
PURPLE='\e[0;35m'
BROWN='\e[0;33m'
LIGHTGRAY='\e[0;37m'
DARKGRAY='\e[1;30m'
LIGHTBLUE='\e[1;34m'
LIGHTGREEN='\e[1;32m'
LIGHTCYAN='\e[1;36m'
LIGHTRED='\e[1;31m'
LIGHTPURPLE='\e[1;35m'
YELLOW='\e[1;33m'
WHITE='\e[1;37m'
NC='\e[0m'

export PROMPT_COMMAND=__prompt_command

__prompt_command() {
  FILE_COUNT=$(ls -1 | wc -l | sed 's: ::g')
  FILE_SIZE=$(ls -lah | grep -m 1 total | sed 's/total //')

  PS1="$NC$(if [[ ${EUID} == 0 ]]; then echo -ne "$RED\u@\h$NC"; else echo -ne "\u@\h"; fi) ($LIGHTBLUE$FILE_COUNT$NC) ($LIGHTGREEN$FILE_SIZE$NC) [\w]\n$NC\$([[ \$? != 0 ]] && echo \"$RED⬢ $NC\" || echo \"$GREEN⌬ $NC\") "
}