Update README.md

README.md

@@ -1,2 +1,37 @@
 # TITimer
-Pretty timer ⏰
+## Pretty timer ⏰
+
+The library allows you to create a timer that works either with [RunLoop](#Runloop) or with [GCD](#GCD).
+
+### Features
+
+- Track the time even while the application is in the background. For more, see - [TimerRunMode](/Sources/TITimer/Enums/TimerRunMode.swift)
+- Create a timer on a personal queue or on a special Runloop mode. For more, see - [TimerType](Sources/TITimer/Enums/TimerType.swift)
+- The code is covered by tests 🙂
+
+### Examples
+
+#### RunLoop
+
+```swift
+timer = TITimer(type: .runloopTimer(runloop: .current, mode: .default), mode: .activeAndBackground)
+
+timer.eventHandler = {
+   // handle elapsed time
+}
+
+timer.start()
+timer.invalidate()
+```
+#### GCD
+
+```swift
+timer = TITimer(type: .dispatchSourceTimer(queue: .main), mode: .activeAndBackground)
+
+timer.eventHandler = {
+   // handle elapsed time
+}
+
+timer.start()
+timer.invalidate()
+```