66. Demultiplexer

How do you plan to solve it?

/*Write your code here*/
module demux1to4 (input d,
                input [1:0] s,
                output reg [3:0]y);
 always@(*)
  begin
    y=4'b0;
  case(s)
   2'b00:y[0]=d;
   2'b01:y[1]=d;
   2'b10:y[2]=d;
   2'b11:y[3]=d;
   default:y[3:0]=0;

  endcase 
  end 
endmodule