134. create your own Cookie

We can get and set cookie by document.cookie.

document.cookie = 'bfe=dev'// "bfe=dev"document.cookie = 'bfe1=dev1'// "bfe1=dev1"document.cookie// "bfe=dev; bfe1=dev1"

Please create your own myCookie.

1. it should support get and set.

document.myCookie = 'bfe=dev'// "bfe=dev"document.myCookie = 'bfe1=dev1'// "bfe1=dev1"document.myCookie// "bfe=dev; bfe1=dev1"

2. there a few options to cookie, but in this problem, you only need to support max-age which means the cookie should be deleted after certain time(in seconds).

document.myCookie = 'bfe=dev; max-age=1'// "bfe=dev; max-age=1"document.myCookie// "bfe=dev"

after 1 second

document.myCookie// ""

3. in your code, please enable myCookie in install() and remove the logic in uninstall(), these are used in judging.