diff --git a/Eagle.java b/Eagle.java
index d0e8799..f03b22e 100644
--- a/Eagle.java
+++ b/Eagle.java
@@ -1,4 +1,4 @@
-public class Eagle extends Bird {
+public class Eagle extends Bird implements Fly {
 
     private boolean flying;
     private int altitude;
@@ -21,4 +21,32 @@ public boolean isFlying() {
     public String sing() {
         return "Screech!";
     }
+
+    @Override
+    public void takeOff(){
+        System.out.println(this.getName() + " takes off in the sky.");
+    }
+
+
+    @Override
+    public void ascend(int altitude){
+        this.altitude += altitude;
+        System.out.println(this.getName() + " flies upward, altitude : " + this.altitude);
+    }
+
+    @Override
+    public void glide(){
+        System.out.println("It flides into the air.");
+    }
+
+    @Override
+    public void descend(int altitude){
+        this.altitude -= altitude;
+        System.out.println(this.getName() + " flies downward, altitude : " + this.altitude);
+    }
+
+    @Override
+    public void land(){
+        System.out.println(this.altitude > 1 ? this.getName() + " is too high, it can't lands." : this.getName() + " lands on the ground.");
+    }
 }
diff --git a/Fly.java b/Fly.java
new file mode 100644
index 0000000..be3dbf0
--- /dev/null
+++ b/Fly.java
@@ -0,0 +1,11 @@
+public interface Fly {
+  void takeOff();
+
+  void ascend(int distance);
+
+  void glide();
+
+  void descend(int distance);
+
+  void land();
+}
\ No newline at end of file
diff --git a/Nature.java b/Nature.java
index fe104f5..ba57439 100644
--- a/Nature.java
+++ b/Nature.java
@@ -1,19 +1,27 @@
 public class Nature {
 
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+                                                        // BIEN CHANGER DE BRANCH ET SE PLACER SUR MAIN
+
     public static void main(String[] args) {
 
         Penguin pingou = new Penguin("Pingou");
-        pingou.dive();
-        pingou.swimDown(3);
-        pingou.swimUp(1);
-        pingou.swimDown(4);
-        pingou.swimUp(5);
-        pingou.swimUp(1);
-        pingou.getOut();
+        // pingou.dive();
+        // pingou.swimDown(3);
+        // pingou.swimUp(1);
+        // pingou.swimDown(4);
+        // pingou.swimUp(5);
+        // pingou.swimUp(1);
+        // pingou.getOut();
 
         Eagle hawkeye = new Eagle("Hawkeye");
         // TODO : uncomment the following code in order to test it
-        /*
+ 
         hawkeye.takeOff();
         hawkeye.ascend(120);
         hawkeye.ascend(30);
@@ -22,6 +30,6 @@ public static void main(String[] args) {
         hawkeye.land();
         hawkeye.descend(9);
         hawkeye.land();
-        */
+    
     }
 }