module interval_configurable(
    input CLOCK_50,
    output reg tick);

     reg [25:0] count = 0;

     parameter numerator=1;
     parameter denominator = 1;

     reg signal;

    always @(posedge CLOCK_50)
        begin
            if(count == 10 * numerator / denominator) //50000000
                begin
                    count <= 0;
                    signal <= 0;
                end
            else if(count == 0)
                signal <= 1;
            if(signal)
                begin
                    count <= count + 1;
                    tick <= 1;
                end
            else
                begin
                    count <= count - 1;
                    tick <= 0;
                end
        end
endmodule