求助，modelsim在仿真的时候没有波形

在quartus里运行没有错误，调用modelsim时不出波形


` timescale 1 ns/ 1 ns
module fp_prj_vlg_tst();
// constants
// general purpose registers
reg eachvec;
// test vector input registers
reg clk;
reg rst_n;
// wires
wire fm;

// assign statements (if any)
fp_prj i1 (
// port map - connection between master ports and signals/registers
.clk(clk),
.fm(fm),
.rst_n(rst_n)
);

initial
begin
clk=0;
forever
#10 clk=~clk;
end
initial
begin
rst_n=0;
#1000
rst_n=1;
#5000
$stop;
end
endmodule