[CART360] cart360 assignment#3.

[Vincent Leclerc]

>  For this week homework, I'm not sure that I understood this first part:
> Make a simple interactive object that (1) affords a binary action
> modality...

Since we didn't have enough time to discuss the assignment in details,
just show me that you can do digital input and digital output on the
arduino. If you feel like making more than this, think about making an
object (not necessarily augmenting an existing object) that affords a
binary action modality (that you could implement with a switch
connected to a digital input on the arduino).

> And  ...binary action modality... means two ways communication doesn't it?

Binary, means discrete, means there are _only_ 2 possible options to
this action/state, means true or false, on or off, pushed or not, sat
on or not, alone or not, swallowed or not, grabbed or not, opened or
not, etc.

Vincent