I want to add two encoders to my robot's wheels but I don't understand the example sketch that is included with this library. It just seems to show two similar methods for how to get if CW or CCW direction. How do I accumulate encoder counts into two variables (add if CW, subtract if CCW)? Or how to get and log counts from the encoders? Also, the description about what pins to use on my Uno R3 is very confusing (it uses some sort of ASCII diagram and a strange table and symbols). Not sure what Arduino model it is describing.