I made my own ZSH theme which is basically half-life
with tweaks that modify it to exactly what I want.
Download it:
curl https://skelmis.co.nz/skelmis.zsh-theme --output ~/.oh-my-zsh/themes/skelmis.zsh-theme
Then in .zshrc
modify ZSH_THEME
to ZSH_THEME="skelmis"