You will be Gold from 3rd Feb 2013 until 8 June 2014 (16 months) unless you reach 1500tp between 9 June 2013 and 8 June 2014

You will then drop to Silver for 9th June 2014 to 8th June 2015 (although you may have some gold privileges like lounge access until the end of June or end of July)

You will then drop to bronze for 9th June 2015 to 8th June 2016 unless you reach 600tp between 9th June 2014 and 8th June 2015

By the end of July 2016 you will simply be a pleb with no status. You won't be able to cope, and you'll book a tier-point run to fix your problem.

This is assuming you never fly again.

In other words, no need to worry about organising your flights to maintain lounge access until June 2014

(unless you get addicted to GF)