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+module demo (
+ input wire CLK_IN,
+ output wire R_LED
+);
+ parameter time1 = 30'd12_000_000;
+ reg led_state;
+ reg [29:0] count;
+
+ always @(posedge CLK_IN)begin
+ if(count == time1)begin
+ count<= 30'd0;
+ led_state <= ~led_state;
+ end
+ else
+ count <= count + 1'b1;
+ end
+ assign R_LED = led_state;
+endmodule