I think the example's last visualization is confusing. The timeline is {date1, date2, date3, date4}. Let's say you have 2 periods, date1 - date3, and date2 - d

I think the example's last visualization is confusing. The timeline is {date1, date2, date3, date4}. Let's say you have 2 periods, date1 - date3, and date2 - date4. Period 1 can be represented as {date1, date2, date3}. Period 2 can be {date2, date3, date4}. Am I understanding this correctly?