Verilog Code for Binary to 7-segment LED converter

Binary to 7-segment LED display is very easy , it is more like the decoding logic.
Below is the rtl code in Verilog for the same.

7 -Segment Display ->

Binary            7-segment

                       
0000                 a b c d e f g  =>   1 1 1 1 1 1 0
0001                 a b c d e f g  =>   0 1 1 0 0 0 0
0010                 a b c d e f g  =>   1 1 0 1 1 0 1
0011                 a b c d e f g  =>   1 1 1 1 0 0 1
0100                 a b c d e f g  =>   0 1 1 0 0 1 1
0101                 a b c d e f g  =>   1 0 1 1 0 1 1
0110                 a b c d e f g  =>   1 0 1 1 1 1 1
0111                 a b c d e f g  =>   1 1 1 0 0 0 0
1000                 a b c d e f g  =>   1 1 1 1 1 1 1
1001                 a b c d e f g  =>   1 1 1 1 0 1 1


Below is the RTL code for the 7-segment LED Display.

// ---- RTL Code
module led_7_segment_dis (

input [3:0] bin_data,
output reg [6:0] led_7seg

);


always @(*) begin
  led_7seg = 7'b0;
  case(bin_data)    //  abcdefg
   4'h0:  led_7seg = 7'b1111110;
   4'h1:  led_7seg = 7'b0110000;
   4'h2:  led_7seg = 7'b1101101;
   4'h3:  led_7seg = 7'b1111001;
   4'h4:  led_7seg = 7'b0110011;
   4'h5:  led_7seg = 7'b1011011;
   4'h6:  led_7seg = 7'b1011111;
   4'h7:  led_7seg = 7'b1110000;
   4'h8:  led_7seg = 7'b1111111;
   4'h9:  led_7seg = 7'b1111011;
   default : led_7seg = 7'b0;
  endcase
end

always @(*) begin
   $display("Binary number = %d", bin_data);
end

always @(*) begin
  #1;
  if(led_7seg[6])
    $display("       ------");
  if(led_7seg[5] && led_7seg[1]) begin
    $display("       |    |");
    $display("       |    |");
  end
  else if(led_7seg[5]) begin
    $display("            |");
    $display("            |");
  end
  else if(led_7seg[1]) begin
    $display("       |     ");
    $display("       |     ");
  end
  if(led_7seg[0])
    $display("       ------");
  if(led_7seg[4] && led_7seg[2]) begin
    $display("       |    |");
    $display("       |    |");
  end
  else if(led_7seg[4]) begin
    $display("            |");
    $display("            |");
  end
  else if(led_7seg[2]) begin
    $display("       |     ");
    $display("       |     ");
  end
  if(led_7seg[3])
    $display("       ------");
 
end

endmodule


module tb;

reg [3:0] cnt =0;

always #5 cnt = cnt +1 ;

led_7_segment_dis dut(
 .bin_data(cnt)
);

initial begin
 #1000 ;
 $finish;
end

endmodule

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