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'b0000;
    case(s)
    2'b00:y[0]=d;
    2'b01:y[1]=d;
    2'b10:y[2]=d;
    2'b11:y[3]=d;
    default:
    y=4'b0000;
    endcase
end
endmodule