Old Navy is marking the milestone of 5 million Facebook fans (or Likes) by providing a coupon for 30% off a customer’s total purchase this weekend (October 12-14).

However, instead of a traditional coupon, hundreds of people were assembled in a field carrying strategically placed placards, that when photographed from above created a 120 x 60 foot coupon.

The coupon available at oldnavy.com/5million is redeemable at US and Canada Old Navy stores by showing the printed version or by showing it on the screenof your smartphone.

The coupon was created by Crispin Porter + Bogusky.