total area (20,144)

center (10,72)

X AXIS:
camera: left 0, right 19
servo:  positive left, negative right
aiming: x < midpt, elmo on left, turn left, increment
		x > midpoint, elmo on right, turn right decrement

Y AXIS:
camera: top 144, bottom 0
servo: negative up, positive down
aiming: y < midpt increment, y > midpoint decrement