rainbow

rainbow.kt

@Composable
fun rainbowState(
    rainbow: List<Color> = SkittlesRainbow,
    duration: Int = 3000
): State<Color> {
    val infiniteTransition = rememberInfiniteTransition()
    val interval = duration / rainbow.size
    return infiniteTransition.animateColor(
        initialValue = rainbow[0],
        targetValue = rainbow.last(),
        animationSpec = infiniteRepeatable(
            animation = keyframes {
                durationMillis = duration
                var i = 0
                for (color in rainbow) {
                    color at i
                    i += interval
                }
            },
            repeatMode = RepeatMode.Restart
        )
    )
}