Yarn is the softest, squishiest temporal logic there is. It is pull-based FRP library for varying data over time - much like wires or netwire. In fact the types are almost identical to wires and as such the implementation is similar. Differences start to appear in the way signals are combined, switched and chained together.
Yarn aims to be well documented and to have easy to follow function names, operators and patterns. This is very alpha, but works! Examples, tutorials and wiki are in the works.