Do you have to fast for 60 days if you eat on purpose? ?

If you do it by accident, it's ok, you can carry on fasting - no problem. But if you purposefully break your fast, it's really bad. Like I read even if you fast for the rest of your life you can never truly make up for it. But 60 days in a row is the days you have to do if you purposefully eat when your fasting. Not sure why 60 days... maybe someone will tell us.