examples/ecp5_evn_multiboot/blinky1.v

module top(input clk, input btn, output [7:0] led);
    reg [23:0] cnt = 0;

    always@(posedge clk) begin
        cnt <= cnt + 1;
    end
    assign led[0] = cnt[22];
    assign led[7:1] = 7'b1111111;
endmodule