Just a couple guys in a view

gistfile1.txt

class CompoundLayer extends Layer
	@define "selectedTab",
		get: -> @_selectedTab || 0
		set: (p) ->
			@_selectedTab = p
			for tab, i in @tabs
				tab.opacity = 1 - Math.abs(i - p)
				
	constructor: (opts) ->
		super opts
		@tab1 = new Layer
			backgroundColor: "red"
			opacity: 0
		@tab2 = new Layer
			backgroundColor: "blue"
			x: 100
			opacity: 0
		@tab3 = new Layer
			backgroundColor: "green"
			x: 200
			opacity: 0
		@tabs = [@tab1, @tab2, @tab3]
		@on Events.Click, ()  =>
			@animate
				properties:
					selectedTab: 1 + @selectedTab
				curve: "bezier-curve"
				
		@selectedTab = 0
		
new CompoundLayer
	backgroundColor: "white"
	width: 300
	height: 300