Download and rename directory
drush dl drupal --drupal-project-rename="mysite"
Install Drupal standard with the database and the account of administrator
drush site-install standard --db-url="mysql://[ user-mysql ]:[ pass-mysql ]@127.0.0.1/[ bdd ]" --site-name="My Website" --account-name="admin" --account-pass="admin" --account-mail="admin@mysite.fr" --sites-subdir="www.mysite.com" -y