html - how to get the previous 4 sunday's of the current date javascript

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I wanna be able to get the previous 4 sunday's of the current date for example current date is
2018-3-1, I want to get 2018-2-25, 2018-2-18, 2018-2-11, 2018-2-4 only in javascript

I have this code but it only gave me the previous sunday of the current date

 var dt = new Date();
 var currentWeekDay = dt.getDay();
 var lessDays = currentWeekDay == 0 ? 6 : currentWeekDay - 0;
 var sunday = new Date(new Date(dt).setDate(dt.getDate() - 
 lessDays));

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