In reply to MadhavSrikantam:
Your question is lacking a purpose. The code I showed you above produce the same results as the fork/join_none. Here is another example
module top;
initial
begin : b1
#5 $display($time, " from block b1");
end : b1
initial
begin : b2
#10 $display($time, " from block b2");
end : b2
initial
begin
$display($time, " from outside fork-join block");
end
endmodule
There are many ways to get the same output results. but there is no way to spawn a process in the background without join_none or join_any.