diff --git a/smartapps/smartthings/-.src/-.groovy b/smartapps/smartthings/-.src/-.groovy
new file mode 100644
index 0000000..9e06c4c
--- /dev/null
+++ b/smartapps/smartthings/-.src/-.groovy
@@ -0,0 +1,198 @@
+/**
+ *  Copyright 2015 SmartThings
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ *  in compliance with the License. You may obtain a copy of the License at:
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ *  on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
+ *  for the specific language governing permissions and limitations under the License.
+ *
+ *  Good Night
+ *
+ *  Author: SmartThings
+ *  Date: 2013-03-07
+ */
+definition(
+    name: "이현주",
+    namespace: "smartthings",
+    author: "SmartThings",
+    description: "Changes mode when motion ceases after a specific time of night.",
+    category: "Mode Magic",
+    iconUrl: "https://s3.amazonaws.com/smartapp-icons/ModeMagic/good-night.png",
+    iconX2Url: "https://s3.amazonaws.com/smartapp-icons/ModeMagic/good-night@2x.png"
+)
+
+preferences {
+	section("When there is no motion on any of these sensors") {
+		input "motionSensors", "capability.motionSensor", title: "Where?", multiple: true
+	}
+	section("For this amount of time") {
+		input "minutes", "number", title: "Minutes?"
+	}
+	section("After this time of day") {
+		input "timeOfDay", "time", title: "Time?"
+	}
+	section("And (optionally) these switches are all off") {
+		input "switches", "capability.switch", multiple: true, required: false
+	}
+	section("Change to this mode") {
+		input "newMode", "mode", title: "Mode?"
+	}
+	section( "Notifications" ) {
+        input("recipients", "contact", title: "Send notifications to") {
+            input "sendPushMessage", "enum", title: "Send a push notification?", options: ["Yes", "No"], required: false
+            input "phoneNumber", "phone", title: "Send a Text Message?", required: false
+        }
+	}
+
+}
+
+def installed() {
+	log.debug "Current mode = ${location.mode}"
+	createSubscriptions()
+}
+
+def updated() {
+	log.debug "Current mode = ${location.mode}"
+	unsubscribe()
+	createSubscriptions()
+}
+
+def createSubscriptions()
+{
+	subscribe(motionSensors, "motion.active", motionActiveHandler)
+	subscribe(motionSensors, "motion.inactive", motionInactiveHandler)
+	subscribe(switches, "switch.off", switchOffHandler)
+	subscribe(location, modeChangeHandler)
+
+	if (state.modeStartTime == null) {
+		state.modeStartTime = 0
+	}
+}
+
+def modeChangeHandler(evt) {
+	state.modeStartTime = now()
+}
+
+def switchOffHandler(evt) {
+	if (correctMode() && correctTime()) {
+		if (allQuiet() && switchesOk()) {
+			takeActions()
+		}
+	}
+}
+
+def motionActiveHandler(evt)
+{
+	log.debug "Motion active"
+}
+
+def motionInactiveHandler(evt)
+{
+	// for backward compatibility
+	if (state.modeStartTime == null) {
+		subscribe(location, modeChangeHandler)
+		state.modeStartTime = 0
+	}
+
+	if (correctMode() && correctTime()) {
+		runIn(minutes * 60, scheduleCheck, [overwrite: false])
+	}
+}
+
+def scheduleCheck()
+{
+	log.debug "scheduleCheck, currentMode = ${location.mode}, newMode = $newMode"
+	
+	if (correctMode() && correctTime()) {
+		if (allQuiet() && switchesOk()) {
+			takeActions()
+		}
+	}
+}
+
+private takeActions() {
+	def message = "Goodnight! SmartThings changed the mode to '$newMode'"
+	send(message)
+	setLocationMode(newMode)
+	log.debug message
+}
+
+private correctMode() {
+	if (location.mode != newMode) {
+		true
+	} else {
+		log.debug "Location is already in the desired mode:  doing nothing"
+		false
+	}
+}
+
+private correctTime() {
+	def t0 = now()
+	def modeStartTime = new Date(state.modeStartTime)
+	def startTime = timeTodayAfter(modeStartTime, timeOfDay, location.timeZone)
+	if (t0 >= startTime.time) {
+		true
+	} else {
+		log.debug "The current time of day (${new Date(t0)}), is not in the correct time window ($startTime):  doing nothing"
+		false
+	}
+}
+
+private switchesOk() {
+	def result = true
+	for (it in (switches ?: [])) {
+		if (it.currentSwitch == "on") {
+			result = false
+			break
+		}
+	}
+	log.debug "Switches are all off: $result"
+	result
+}
+
+private allQuiet() {
+	def threshold = 1000 * 60 * minutes - 1000
+	def states = motionSensors.collect { it.currentState("motion") ?: [:] }.sort { a, b -> b.dateCreated <=> a.dateCreated }
+	if (states) {
+		if (states.find { it.value == "active" }) {
+			log.debug "Found active state"
+			false
+		} else {
+			def sensor = states.first()
+		    def elapsed = now() - sensor.rawDateCreated.time
+			if (elapsed >= threshold) {
+				log.debug "No active states, and enough time has passed"
+				true
+			} else {
+				log.debug "No active states, but not enough time has passed"
+				false
+			}
+		}
+	} else {
+		log.debug "No states to check for activity"
+		true
+	}
+}
+
+private send(msg) {
+    if (location.contactBookEnabled) {
+        sendNotificationToContacts(msg, recipients)
+    }
+    else {
+        if (sendPushMessage != "No") {
+            log.debug("sending push message")
+            sendPush(msg)
+        }
+
+        if (phoneNumber) {
+            log.debug("sending text message")
+            sendSms(phoneNumber, msg)
+        }
+    }
+
+	log.debug msg
+}
\ No newline at end of file