val _photos = arrayOf(
            Pair("Azami", R.drawable.azami),
            Pair("Bike", R.drawable.bike),
            Pair("Leaf", R.drawable.leaf1),
            Pair("Leaf", R.drawable.leaf2)
        )

        setContent {
            val _dummy = remember { mutableStateOf(0) }
            val _flag = mutableStateOf(false)

            val _photo0 = _photos[0].second
            val _modifier0 = Modifier.drawWithContent {
                drawContent()
                if(_flag.value)   // _flagの変更 -> Drawingをスケジューリング
                    drawRoundRect(color = Color.Red, style = Stroke(3.0f))
            }
            
            val _photo1 = _photos[1].second
            val _modifier1 = Modifier.offset {
                if(_flag.value)   // _flagの変更 -> Layoutをスケジューリング
                    IntOffset(10.dp.roundToPx(), 0)
                else
                    IntOffset.Zero
            }
            
            var _photo2 = _photos[2].second
            val _modifier2 = Modifier
            
            MyApplicationTheme {
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    Column(
                        horizontalAlignment = Alignment.CenterHorizontally,
                        verticalArrangement = Arrangement.Center
                    ) {
                        Photo(_photo0, modifier = _modifier0)
                        Spacer(modifier = Modifier.size(10.dp))

                        Photo(_photo1, modifier = _modifier1)
                        Spacer(modifier = Modifier.size(10.dp))

                        Photo(_photo2, modifier = _modifier2)
                        Spacer(modifier = Modifier.size(10.dp))

                        // ↓↓Surface階層に再Composeをスケジューリングためのダミー↓↓
                        val __dummy = _dummy.value
                        Button(onClick = {_dummy.value++}) {
                            Text(text = "Recompose ${__dummy}")
                        }
                    }
                }
            }
            // 別スレッドで状態を更新
            val _coroutineScope = rememberCoroutineScope()
            _coroutineScope.launch(Dispatchers.Default) {
                delay(10000)
                _flag.value = true
                _photo2 = _photos[3].second   // _photo2の変更 -> Compositionをスケジューリング
            }
        }

@Composable
fun Photo(@DrawableRes id: Int, modifier: Modifier = Modifier) {
    Image(
        painter = painterResource(id), contentDescription = null,
        modifier = modifier.size(140.dp, 105.dp)
    )
}