*Test for linefollower robot*
Nodes linelogic3 and linelogic4
This nodes get 3 or 4 boolean data, and outputs one number for each case of possible combinations.
To use the nodes in your project you should have the 
fortunatoa3/linelogic library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See 
Using libraries for more info.