blink.v

`default_nettype none
module top (
	input clk48,
	output rgb_led0_r,
	output rgb_led0_g,
	output rgb_led0_b,
	output gpio_0,
	input gpio_a0,
	inout scl,
	inout sda
);

	assign rgb_led0_g = ~gpio_a0;

    // Create a 27 bit register
    reg [26:0] counter = 0;

    // Every positive edge increment register by 1
    always @(posedge clk48) begin
        counter <= counter + 1;
    end

	assign gpio_0 = counter[20];

endmodule