Based on bira https://github.com/robbyrussell/oh-my-zsh/blob/master/themes/bira.zsh-theme

Right now the idea es to use unicode: here some options that looks pretty good:

HOME - ⌂ - ⟰ - 㑞

local - ♎ - ⚙ - ⚶ - ✙ - ✪ - ✱ - ⟴ - ⧁ - ⨁ - 

I use this site to look for unicode http://www.alanwood.net/unicode/miscellaneous_symbols_and_arrows.html

Folowing this steps: https://github.com/robbyrussell/oh-my-zsh/wiki/Customization#overriding-and-adding-themes

Just copy in ~/.oh-my-zsh/custom