bash prompt with color return code feedback

# Set the prompt (Fixed to do home directory properly)
# Changes color if your last command failed to run successfully, but it also shortens long paths and contains the bash history number of each command for easy retrieval.

PS1="\[\033[0;33m\][\!]\`if [[ \$? = "0" ]]; then echo "\\[\\033[32m\\]"; else echo "\\[\\033[31m\\]"; fi\`[\u.\h: \w]\$\[\033[0m\] "; echo -ne "\033]0;`hostname -s`:`pwd`\007"