Write a description of the flow of this digital frequency meter. Xilinx was used to construct it.

clk 1Hz clk 10Hz clk 100Hz Frequency Divider 100MHz Reference Clock from Spartan-6 FPGA 3-line to 1-line Multiplexer clk 0.5Hz Selected cik 32-bit Load Shift Register Modulo 10000 BCD Counter clk 1kHz 4-Digit Time Multiplexing Unit 7-Segment Displays of Spartan-6 FPGA