Relevant bash for my prompt

pretty_prompt.sh

  # Set the prompt
  export CLICOLOR=1

  source $HOME/.git-completion.sh
  export GIT_PS1_SHOWDIRTYSTATE=1
  export GIT_PS1_SHOWSTASHSTATE=1

  win-divider() {
      s="_"
      o=""
      let nl=$COLUMNS

      for i in `seq 1 $nl`; do o="${o}${s}"; done
      echo $o
  }

  TBytes() {
      TBytes=0
      for Bytes in $(ls -l | grep "^-" | awk '{ print $5 }')
      do
          let TBytes=$TBytes+$Bytes
      done
      TotalMeg=$(echo -e "scale=3 \n$TBytes/1048576 \nquit" | bc)
      echo -n "$TotalMeg"
  }

      export PS1="\[\e[1m\]\$(win-divider)\n| \[\e[1;30;47m\]\[\e[1;30;31m\][\$(date +%m-%d\" \"%H:%M)] \[\e[1;30;34m\]\u\[\e[1;30;31m\]@\[\e[1;30;32m\]\h\[\e[1;30;47m\]:\[\e[1;30;34m\]\w \[\e[1;30;47m\](\[\e[1;30;36m\]\$(TBytes) Mb\[\e[1;30;47m\])\$(__git_ps1 \" (%s)\")\[\e[0m\]\n\$ "