I will note that their suggestion of using an FPGA to do the flashing LED is far far far more complicated than it needs to be. Two AND gates, a decade counter

I will note that their suggestion of using an FPGA to do the flashing LED is far far far more complicated than it needs to be. Two AND gates, a decade counter and a timer are all you'd really need to make it flash after hitting the button. Adding a reset could be as simple as another button or another counter depending on how you want to go about it (or if you get creative, i bet it could be done with a JK flipflop). Though adding the MCU (or an FPGA) does allow you do far more than just flashing it at some interval, you can also make it fade in and out far easier, and a number of other things like that.