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