```scss
// Property(ies): zIndex
// Component(s): Ti.UI.Animation, Ti.UI.View
'.z-0': { zIndex: 0 }
'.z-10': { zIndex: 10 }
'.z-20': { zIndex: 20 }
'.z-30': { zIndex: 30 }
'.z-40': { zIndex: 40 }
'.z-50': { zIndex: 50 }
```