Added FlashEvent.

core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/CustomFlashEvent.kt

@@ -6,7 +6,7 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
 /**
- * Emits a flash with custom settings.
+ * Emits a flash with custom settings. For more simplified one, see [FlashEvent].
  * @property startColor The start color of the flash.
  * @property startOpacity The start opacity of the flash.
  * @property endColor The end color of the flash.

core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/FlashEvent.kt

@@ -0,0 +1,36 @@
+package cn.rdlevel.rdkt.core.events
+
+
+import cn.rdlevel.rdkt.core.data.ROOM1
+import cn.rdlevel.rdkt.core.data.RoomsOrTopLayer
+import cn.rdlevel.rdkt.core.data.roomsOf
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlin.jvm.JvmOverloads
+
+/**
+ * Emits a white flash with a specified duration. For more advanced one, see [CustomFlashEvent].
+ * @property duration The duration of the flash.
+ */
+@Serializable
+@SerialName("Flash")
+public data class FlashEvent @JvmOverloads constructor(
+    var duration: Duration,
+    override var rooms: RoomsOrTopLayer = roomsOf(ROOM1),
+) : ActionEvent(), MutableRoomsOrTopLayerSpecificEvent {
+    /**
+     * Represent the duration of the flash.
+     * @property beats The time corresponding to the duration in beats.
+     */
+    @Serializable
+    public enum class Duration(public val beats: Double) {
+        @SerialName("Short")
+        SHORT(1.0),
+
+        @SerialName("Medium")
+        MEDIUM(2.0),
+
+        @SerialName("Long")
+        LONG(4.0)
+    }
+}