entity Main {
    in clk: bit,
    out LED1: bit,
    out LED2: bit,
    out LED3: bit,
    out LED4: bit,
    out LED5: bit,
    in PMOD1: bit,
    out PMOD2: bit,
    out PMOD3: bit,
    out PMOD4: bit,
    in DCDn: bit,
    in DSRn: bit,
}

impl Main {
    on clk.negedge {
        LED1 <= DCDn;
        LED2 <= DSRn;
    }
}