Put a thumbs-up or thumbs-down in your prompt based on the exit code of the last command

thumbs.sh

thumbsDown=$(printf "\xF0\x9F\x91\x8E")
thumbsUp=$(printf "\xF0\x9F\x91\x8D")
function exitIcon()
{
    if [ $? -eq 0 ]
    then
  echo $thumbsUp
    else
	echo $thumbsDown
    fi
}

export PS1='[\[\033[33;1m\]\d \T\[\033[0m\] \[\033[32;1m\]\u@\h \[\033[34m\]\W\[\033[0m\]] $(exitIcon)\n$ '