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fnd_data=8'b11111110;
door_flag=0;
yellow=0;
green=1;
if(~mid_idle & mid_cnt_max & mid_state==1) begin
// 2 층 도달
mo=2'b00;
ns=twos;
end
else if(~three_idle & three_cnt_max & three_state) begin
// 2 층 누르고 3 층도 누름
three_flag=1;
end
else begin mo=2'b10; ns=M1F_2F; end
end

M2F_1F : begin // 2 층에서
fnd_data=8'b11110111;
one_flag=0;
door_flag=0;
yellow=1;
green=0;
if(~bot_idle & bot_cnt_max & bot_state==1) begin
// 1 층 도달
mo=2'b00;
ns=ones;
end
else begin mo=2'b11; ns=M2F_1F; end
end

M1F_3F : begin // 1 층에서
fnd_data = 8'b11111110;
door_flag = 0;
yellow = 0;
green = 1;
if(~top_idle & top_cnt_max & top_state==1) begin
// 3 층 도달
mo = 2'b00;
ns = threes;
end
else if((((red==0)&&
(~twou_idle & twou_cnt_max & twou_state))||
(~two_idle & two_cnt_max & two_state))==1) begin
// 3 층 도달 전 2 층 누를 시
mo = mo;

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