diff --git a/app/src/main/java/iam/thevoid/epic/timeapp/MainActivity.kt b/app/src/main/java/iam/thevoid/epic/timeapp/MainActivity.kt
index d08be6e..1338f55 100644
--- a/app/src/main/java/iam/thevoid/epic/timeapp/MainActivity.kt
+++ b/app/src/main/java/iam/thevoid/epic/timeapp/MainActivity.kt
@@ -1,10 +1,18 @@
 package iam.thevoid.epic.timeapp
 
-import androidx.appcompat.app.AppCompatActivity
+import android.graphics.Color
 import android.os.Bundle
 import android.widget.Button
 import android.widget.EditText
 import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Observable
+import io.reactivex.rxjava3.disposables.Disposable
+import io.reactivex.rxjava3.schedulers.Schedulers
+import java.text.SimpleDateFormat
+import java.util.*
+import java.util.concurrent.TimeUnit
 
 // Дан экран с готовой разметкой
 // Реализовать при помощи RxJava
@@ -39,22 +47,143 @@ class MainActivity : AppCompatActivity() {
     // Секундомер
     private lateinit var stopwatchText: TextView
     private lateinit var stopwatchMillisText: TextView
-    private lateinit var stopwatchStartButton: EditText
-    private lateinit var stopwatchEndButton: EditText
+    private lateinit var stopwatchStartButton: Button
+    private lateinit var stopwatchEndButton: Button
+    private var timerDisposable: Disposable? = null
+    private var pausedStopWatchVal: Long = 0
+    private var currentStopWatchVal: Long = 0
+    private val stopWatchDisposables: MutableList<Disposable> = mutableListOf()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+
         clockText = findViewById(R.id.clockText)
+        subscribeClock()
 
         countdownText = findViewById(R.id.countdownText)
         countdownSecondsEditText = findViewById(R.id.countdownEditText)
         countdownStartButton = findViewById(R.id.countdownStartButton)
 
+        countdownStartButton.setOnClickListener {
+            startTimerDown()
+        }
+
         stopwatchText = findViewById(R.id.stopwatchText)
         stopwatchMillisText = findViewById(R.id.stopwatchMillisText)
         stopwatchStartButton = findViewById(R.id.stopwatchStartButton)
         stopwatchEndButton = findViewById(R.id.stopwatchEndButton)
+
+        stopwatchStartButton.setOnClickListener {
+            startTimerUp()
+        }
+
+        stopwatchEndButton.setOnClickListener {
+            pauseTimerUp()
+        }
+
+    }
+
+    private fun subscribeClock() {
+        Observable.interval(1000, TimeUnit.MILLISECONDS)
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
+            .subscribe(
+                { clockText.text = getCurrentTime() },
+                {}
+            )
+
+    }
+
+    private fun getCurrentTime(): String {
+        val calendar: Calendar = Calendar.getInstance()
+        val simpleDateFormat = SimpleDateFormat("HH:mm:ss", Locale.ENGLISH)
+        return simpleDateFormat.format(calendar.time)
+    }
+
+    private fun startTimerDown() {
+        timerDisposable?.dispose()
+        val text = countdownSecondsEditText.text.toString()
+        if (text == "") {
+            countdownText.text = "Введите количество"
+        } else {
+            val amountSec = text.toLong()
+            var currentAmountSec = amountSec
+            countdownText.setBackgroundColor(Color.WHITE)
+            timerDisposable =
+                Observable.intervalRange(amountSec, amountSec + 1, 0, 1000, TimeUnit.MILLISECONDS)
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .doOnComplete { countdownText.setBackgroundColor(Color.BLUE) }
+                    .subscribe(
+                        {
+                            countdownText.text = secondsToTimeString(currentAmountSec)
+                            currentAmountSec--
+                        },
+                        {}
+                    )
+        }
+    }
+
+    private fun startTimerUp() {
+        if (stopWatchDisposables.isEmpty()) {
+            val observable: Observable<Long> = Observable.interval(1, TimeUnit.MILLISECONDS)
+                .subscribeOn(Schedulers.io())
+                .doOnDispose { pausedStopWatchVal = currentStopWatchVal }
+                .map { it + pausedStopWatchVal }
+                .doOnNext { currentStopWatchVal = it }
+
+            stopWatchDisposables.add(observable.observeOn(AndroidSchedulers.mainThread())
+                .subscribe { stopwatchMillisText.text = "${it % 1000}" })
+
+            stopWatchDisposables.add(observable
+                .filter { it % 1000 == 0L }
+                .map { it / 1000 }
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe {
+                    stopwatchText.text = secondsToTimeString(it)
+                })
+            stopWatchStartedPerformance()
+        }
+    }
+
+    private fun secondsToTimeString(seconds: Long): String {
+        return "${seconds / 3600}:${(seconds % 3600) / 60}:${(seconds % 3600) % 60}"
+    }
+
+    private fun pauseTimerUp() {
+        stopWatchDispose()
+        if (currentStopWatchVal == 0L) {
+            pausedStopWatchVal = 0
+            stopWatchStoppedPerformance()
+        } else {
+            stopWatchPausedPerformance()
+        }
+        currentStopWatchVal = 0
+    }
+
+    private fun stopWatchDispose() {
+        stopWatchDisposables.forEach {
+            it.dispose()
+        }
+        stopWatchDisposables.clear()
+    }
+
+    private fun stopWatchStartedPerformance() {
+        stopwatchEndButton.text = "Pause"
+        stopwatchStartButton.text = "Started"
+    }
+
+    private fun stopWatchPausedPerformance() {
+        stopwatchEndButton.text = "Stop"
+        stopwatchStartButton.text = "Continue"
+    }
+
+    private fun stopWatchStoppedPerformance() {
+        stopwatchText.text = secondsToTimeString(0)
+        stopwatchMillisText.text = "0"
+        stopwatchEndButton.text = "Stop"
+        stopwatchStartButton.text = "Start"
     }
 }
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