Verilog_Louis/Introduction/counter/tb_counter.v

module tb_counter;
    reg clk;
    reg rst;
    wire [3:0] count;
    
    counter counter_inst(
        .clk(clk),
        .rst(rst),
        .count(count)
    );

    always #5 clk = ~clk;
    
    initial begin
        
        clk <= 0;
        rst <= 0;


        #20 rst = 1;
        #80 rst = 0;
        #50 rst = 1;

        #20 $finish;
    end
    
    always begin
        #5 clk = ~clk;
    end
endmodule