For this lab, you are to construct a mock burglar alarm. The
system will have three states, armed, disarmed, and alarm, two
inputs in the form of push buttons, and two outputs in the form of
LEDs.
The system should start in the disarmed state with a green LED
lit. Pressing button 1 moves us to the armed state, pressing button
2 (our stand-in for a door contact sensor) does nothing.
In the armed state, the red LED should blink...