LSFR counter for random number

  module LSFR_counter 
#(parameter BITS = 5)
(
input             clk,
input             rst_n,

output reg [4:0] data
);
reg [4:0] data_next;
 always @* begin
  data_next[4] = data[4]^data[1];
  data_next[3] = data[3]^data[0];
  data_next[2] = data[2]^data_next[4];
  data_next[1] = data[1]^data_next[3];
  data_next[0] = data[0]^data_next[2];
 end


 always_ff @(posedge clk or negedge reset) begin
  if(!rst_n)
     data <= 5'h1f;
  else
     data <= data_next;
  end

end endmodule

this is code for LSFR for 4 bit number . i want to implement N bit Random number generator for FPGA board. any one can help me >??