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begin
if(!reset) cs<=sen;
else
begin
cs<=ns;
end
end

endmodule
----------------------------------------------------------------------
module Booser (clk,reset,warning_sig,speaker1,speaker2,speaker3);

input clk, reset, warning_sig;
output speaker1,speaker2,speaker3;

integer tempo_cnt, tone_cnt, addr;
reg [27:0] tone[1:0];
reg spk=0;

parameter tempo=3000000;

parameter do = 50000000/261.625/2;
parameter do_ = 50000000/277.182/2;
parameter rae = 50000000/293.664/2;
parameter rae_= 50000000/311.127/2;
parameter mi = 50000000/329.627/2;
parameter pa = 50000000/349.228/2;
parameter pa_ = 50000000/369.994/2;
parameter sol = 50000000/391.995/2;
parameter sol_= 50000000/415.304/2;
parameter ra = 50000000/440.000/2;
parameter ra_ = 50000000/466.163/2;
parameter si = 50000000/493.883/2;
parameter do_4= 50000000/523.251/2;

assign speaker1 = spk;
assign speaker2 = spk;
assign speaker3 = spk;

initial begin
tone[0]<=sol;
tone[1]<=do_;
end

always @(posedge clk, negedge reset) begin

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