diff --git a/README.md b/README.md
index dafc99d..6303c49 100755
--- a/README.md
+++ b/README.md
@@ -1,7 +1,9 @@
 # Kotlin by Example
-[![official JetBrains project](https://jb.gg/badges/official-plastic.svg)](https://github.com/JetBrains#jetbrains-on-github)
+[![Obsolete JetBrains project](http://jb.gg/badges/obsolete.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
 
-This is sources of [Kotlin Examples](https://play.kotlinlang.org/byExample/overview).
+The repository is archived, please refer to [Kotlin Tour](https://kotlinlang.org/docs/kotlin-tour-welcome.html) for up-to-date Kotlin learning materials.
+
+------------
 
 ### How to make example
 
diff --git a/examples/07_Delegation/01_delegationPattern.md b/examples/07_Delegation/01_delegationPattern.md
index 4b5b27e..9f396da 100755
--- a/examples/07_Delegation/01_delegationPattern.md
+++ b/examples/07_Delegation/01_delegationPattern.md
@@ -7,19 +7,19 @@ interface SoundBehavior {
     fun makeSound()
 }
 
-class ScreamBehavior(val n:String): SoundBehavior {                                // 2
+class ScreamBehavior(val n: String): SoundBehavior {                                // 2
     override fun makeSound() = println("${n.uppercase()} !!!")
 }
 
-class RockAndRollBehavior(val n:String): SoundBehavior {                           // 2
+class RockAndRollBehavior(val n: String): SoundBehavior {                           // 2
     override fun makeSound() = println("I'm The King of Rock 'N' Roll: $n")
 }
 
 // Tom Araya is the "singer" of Slayer
-class TomAraya(n:String): SoundBehavior by ScreamBehavior(n)                       // 3
+class TomAraya(n: String): SoundBehavior by ScreamBehavior(n)                       // 3
 
 // You should know ;)
-class ElvisPresley(n:String): SoundBehavior by RockAndRollBehavior(n)              // 3
+class ElvisPresley(n: String): SoundBehavior by RockAndRollBehavior(n)              // 3
 
 fun main() {
     val tomAraya = TomAraya("Thrash Metal")