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module icebreaker (
input clki,
input btn1,
input btn2,
input btn3,
input btn_n,
output led1,
output led2,
output led3,
output led4,
output led5,
output ledr,
output ledg,
);
wire clk;
SB_GB clk_gb(.USER_SIGNAL_TO_GLOBAL_BUFFER(clki), .GLOBAL_BUFFER_OUTPUT(clk));
localparam BITS = 5;
localparam LOG2DELAY = 22;
reg [BITS+LOG2DELAY-1:0] counter = 0;
reg [BITS-1:0] outcnt;
always @(posedge clk) begin
counter <= counter + 1;
outcnt <= counter >> LOG2DELAY;
end
assign {led1, led2, led3, led4, led5} = outcnt ^ (outcnt >> 1);
assign {ledr, ledg} = ~(!btn_n + btn1 + btn2 + btn3);
endmodule
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