Update README

README.md

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-# ExtraLottie
+# 📝 What is ExtraLottie?
 
-A description of this package.
+ExtraLottie is a SwiftUI wrapper of <a href="https://github.com/airbnb/lottie-ios">Lottie-iOS</a>.
+
+# ℹ️ Info
+
+Currently ExtraLottie supports custom loop mode, `LottieLoopMode`, starting animation from defined progress, looping animation with custom delay time.
+# 🌐 Installation
+
+Add package via SPM. 
+1. Using Xcode 11 go to File > Swift Packages > Add Package Dependency
+2. Paste the project URL: https://github.com/kingkej/ExtraLottie.git
+3. Click on next and select the project target
+
+# ⚙️ How to use
+
+There are 3 available modes to start.
+1. Simply providing animation name as parameter. In that case loop mode is set to `.loop`.
+```swift
+ExtraLottieView(animationName: "filename")
+```
+2. Providing animation name and `LottieLoopMode` (example: `.loop` or `.playOnce`)
+```swift
+ExtraLottieView(animationName: "filename", loopMode: .playOnce)
+```
+3. Providing animation name, `manualLoop` - set true to use custom delay, `delayBetweenLoop` - specifies time between loops (in seconds), `fromProgress` - specifies progress to start animation, set 0 to start from the beggining.
+```swift
+ExtraLottieView(animationName: "filename", manualLoop: true, delayBetweenLoop: 5.0, fromProgress: 0)
+```
+
+# ✅ Examples
+This example makes animation view with loops. Delay between loops is 5 seconds.
+```swift
+import SwiftUI
+import ExtraLottie
+
+struct ContentView: View {
+    var body: some View {
+        ExtraLottieView(animationName: "64112-loading-bar-progress-bar", manualLoop: true, delayBetweenLoop: 5.0, fromProgress: 0)
+    }
+}
+
+struct ContentView_Previews: PreviewProvider {
+    static var previews: some View {
+        ContentView()
+    }
+}
+```