@Composable
fun App() {
    val navigator = rememberSupportingPaneScaffoldNavigator()
    SupportingPaneScaffold(
        directive = navigator.scaffoldDirective,
        value = navigator.scaffoldValue,
        supportingPane = {
            AnimatedPane {
                Text("Supporting")
            }
        },
        mainPane = {
            AnimatedPane {
                Text("Main")
            }
        }
    )
    LaunchedEffect(true) {
        delay(1000)
        navigator.navigateTo(SupportingPaneScaffoldRole.Supporting)
        delay(1000)
        navigator.seekBack(fraction = 0.5f)
    }
}