wave2.v

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`timescale 10ns/1ns
module wave2;
reg wave;
parameter cycle=5;

initial fork
              wave=0;
   #(cycle)   wave=1;
   #(2*cycle) wave=0;
   #(3*cycle) wave=1;
   #(4*cycle) wave=0;
   #(5*cycle) wave=1; 
join
initial $monitor($time,"wave=%b",wave);
endmodule