drive leds with wifi RN171 shield

Hello everyone
my idea is to drive an LED with Arduino
I have already purchased the following wify shield
http://www.elecrow.com/wiki/index.php?title=WiFi_Shield
This shield uses libraries wifly and I started the web server. I do not find, however, no one from which to control a relay via gui.
I used the search function but I found many people with the same problem but no solution
could you help me?

thanks