First step is to download the theme from GitHub by clicking here or by using git clone:
git clone https://github.com/erikkubica/netlime-starter-theme-v2.git
Feel free to visit https://github.com/erikkubica/netlime-starter-theme-v2 and browse the repository.
After you downloaded and unziped or cloned you need to install theme packages using
php composer.phar update