 In 2014 , the hardware and software behind the fountain 's operation were replaced . At the time there were plans to replace LED lighting with <unk> bulbs on each of the non @-@ video display surfaces and to replace the video surface LEDs . Plensa , who maintained control of the video faces for the first two years of the fountain 's operation , <unk> that future generations may wish to update the faces used in the rotation of videos to reflect changes in humanity going forward . In 2014 , an additional 1000 faces were anticipated for 2016 . 
