Installation instructions for Windows, MacOS and Linux can be found here.
In Bash:
cd "$(dirname "$(spicetify -c)")/Themes"
git clone https://github.com/Daksh777/SpicetifyTheme
spicetify config current_theme SpicetifyTheme color_scheme [dark/base]
spicetify apply
In Powershell:
cd "$(spicetify -c | Split-Path)\Themes"
git clone https://github.com/Daksh777/SpicetifyTheme
spicetify config current_theme SpicetifyTheme color_scheme [dark/base]
spicetify apply