The Internet of Things scales the Internet to billions of embedded nodes and allows to link physical and cyber systems to form complex control systems. Current research focuses mainly on the networking and communication protocols and leaves the application layer and aspects like the engineering process and creation of control logic out of scope. Existing approaches are mainly based on using scripting languages to create control logic for the Internet of Things, which is a problem for nontechnical users. This paper presents oBeliX which is a generic user interface and graphical control logic editor for the Internet of Things. The system requirements to enable a scripting-free creation of control logic are stated and a concrete system fulfilling these requirements together with a proof of concept implementation and evaluation are presented.