The answer can be seen in the sequence of photographs above. The photograph at the left was taken after the candles were lit but before the tube had been put in place over the candles. The left center picture was taken immediately after the tube was placed over the candles. The center photograph was taken after about one minute. The right center photograph was taken after about 1.5 minutes, and the photograph at the right was taken after about 2.5 minutes, showing the order in which the candles became extinguished.