Mine

function setprompt
{
export black="\[\033[30m\]"
export grey="\[\033[1;30m\]"
export red="\[\033[1;31m\]"
export green="\[\033[1;32m\]"
export yellow="\[\033[1;33m\]"
export blue="\[\033[1;34m\]"
export magenta="\[\033[1;35m\]"
export cyan="\[\033[1;36m\]"
export white="\[\033[1;37m\]"
DATE=$(date +'%H:%M')
if [ `id -u` = 0 ] # check if user is root
then
export PS1="$yellow\${DATE}:$white[$yellow\u$white \w]$yellow =>$white "
else
export PS1="$cyan\${DATE}:$white[$cyan\u$white \w]$cyan =>$white "
fi
}
setprompt