66. Demultiplexer

How do you plan to solve it?

module demux1to4(
    input d,
    input [1:0]s,
    output reg [3:0]y
);
    integer i;
    always@(*) begin
        for(i=0 ; i<4; i=i+1) begin 
            if(s==i)
              y[i]=d;
            else
              y[i]=1'b0;
        end
    end
endmodule