# Constructors can take parameters (that automatically become properties)
constructor Ball(color, radius)
	
	# Objects can also have functions (closures)
	:volume
		return 4/3 * {pi} * (radius ** 3)
	end
	:show
		return "a " + color + " ball with radius " + radius
	end
	
end

red_ball = Ball("red", 2)
print(red_ball)
# => a red ball with radius 2