Next, I needed a method to display the ocean range I chose -- 20x20.

Ocean methodsFor: 'display'

display
	"Walk through a 20x20 space.  If there's a life there, have it display
	 itself.  If not, just put a marker."
	| aLife |
	Transcript cr; show: 'OCEAN:'; cr; cr.
	1 to: 20 do: [:x |
		1 to: 20 do: [:y | 
			aLife := self isFood: occupants at: x at: y.
			(aLife isNil) ifTrue: [Transcript show: '='.]
				ifFalse: [aLife display]].
		Transcript cr.]