To make this site work properly, we sometimes place small data files called cookies on your device. Most websites do this too.
A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.
Enabling these cookies is not strictly necessary for the website to work but it will provide you with a better browsing experience. You can delete or block these cookies, but if you do that some features of this site may not work as intended. The cookie-related information is not used to identify you personally and the pattern data is fully under our control.