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; 
endcase
end
endmodule