Marquee

@Composable
fun MarqueeText(announcement: String, marqueeSpeed: MarqueeSpeed, modifier: Modifier = Modifier) {
    val scrollState = rememberScrollState()
    val scope = remember { CoroutineScope(SupervisorJob() + Dispatchers.Main.immediate) }
    onDispose { scope.cancel() }
    ScrollableRow(scrollState = scrollState, modifier = modifier, children = {
        Row {
            repeat(1000) {
                Text(
                    text = announcement, maxLines = 1
                )
            }
        }
        val scrollBy = when (marqueeSpeed) {
            MarqueeSpeed.SLOW -> 2f
            MarqueeSpeed.MEDIUM -> 6f
            MarqueeSpeed.FAST -> 9f
        }
        scrollState.smoothScrollBy(scrollBy)
        scope.launch {
            while (true) {
                scrollState.smoothScrollBy(scrollBy)
                delay(50)
            }
        }

    })
}

remember { CoroutineScope… }

rememberCoroutineScope()

*Effect

LaunchedTask

LaunchedEffect

ScrollableRow

MarqueeText