You can find in the folder **./examples**. This will help you get in touch with the software and test different configurations to see how FPGA-SPICE reacts to them.
In all the examples, the CLBs are composed of LUTs, FFs and MUXs as a base.
Example 1 shows a very basic design with only 4 inputs on the LUTs and 1 Basic Element in the CLBs. It implements an inverter and allows the user to see the very core of the .xml file.