Due to a security strategy, Display won't load all Sensors built by the people.
UNLESS, you disable the security flag and you open the system.
You can open Display simply adding to the url the parameter sys=true
example:
http://protobot.xyz/display/?sys=true&s=anonymous-gist-code
TESTER for development.
For fastening the procedure Protobot.xyz offers Tester
Tester has the security check function missing. Any code will be loaded.
Tester is the direct solution for development.
http://protobot.xyz/tester/?s=anonymous-gist-code
Tester is under construction!