well its easier if you watch the video trust me it works i just tried it in survival and i dont want people on my server doing it too 😉 just copy and paste this youtube link
MC-68286
duplication glitch in survival with the new item frames putting out a redstone signal
Resolved
Duplicate
0
christopher kuntz
(Unassigned)
Unconfirmed
Minecraft 14w34c
Retrieved
Duplicate of fixed MC-51610
Are you sure that you can reproduce it in 14w34c?