SPI slave from https://www.fpga4fun.com/SPI2.html

[trilby-hat-fpga] / led.v

module top(
                output green_led_d7,
                output orange_led_d8,
                output red_led_d5,
                output yellow_led_d6
        );
        assign green_led_d7  = 1;
        assign orange_led_d8 = 1;
        assign red_led_d5    = 1;
        assign yellow_led_d6 = 1;

endmodule