diff --git a/list/src/main/java/de/vivi/list/ArrayByteList.java b/list/src/main/java/de/vivi/list/ArrayByteList.java
index d30b4ee..cc3744a 100644
--- a/list/src/main/java/de/vivi/list/ArrayByteList.java
+++ b/list/src/main/java/de/vivi/list/ArrayByteList.java
@@ -1,11 +1,14 @@
 package de.vivi.list;
 
 import java.util.Arrays;
+import java.util.Iterator;
+import java.util.function.Consumer;
 
 public class ArrayByteList implements ByteList {
 
     private int size = 0;
-    private byte[] array;
+    byte[] array;
+    Iterator b = null;
 
     @Override
     public void add(byte value) {
@@ -65,7 +68,7 @@ public class ArrayByteList implements ByteList {
     }
 
     @Override
-    public boolean contains(byte value) {
+    public boolean contains(int value) {
         boolean isIndexInArray = false;
         for (int i = 0; i < array.length; i++) {
             if (array[i] == value) {
@@ -76,15 +79,14 @@ public class ArrayByteList implements ByteList {
     }
 
     public String toString() {
-        return "\"" + Arrays.toString(array) + "\"";
+        return Arrays.toString(array);
     }
 
     @Override
-    public String copy() {
-        byte[] newArray = new byte[array.length];
-        System.arraycopy(array, 0, newArray, 0, array.length);
-        array = newArray;
-        return Arrays.toString(newArray);
+    public ArrayByteList copy() {
+        ArrayByteList newArrayList = new ArrayByteList();
+        newArrayList.array = Arrays.copyOf(array, size);
+        return newArrayList;
     }
 
     @Override
@@ -93,4 +95,21 @@ public class ArrayByteList implements ByteList {
         System.arraycopy(array, 0, newArray, 0, 0);
         array = newArray;
     }
+
+    @Override
+    public byte[] toArray() {
+        return Arrays.copyOf(array, size);
+    }
+
+
+    @Override
+    public Iterator iterator() {
+
+        return b;
+    }
+
+    @Override
+    public void forEach(Consumer action) {
+        ByteList.super.forEach(action);
+    }
 }
diff --git a/list/src/main/java/de/vivi/list/BubbleSort.java b/list/src/main/java/de/vivi/list/BubbleSort.java
new file mode 100644
index 0000000..365c523
--- /dev/null
+++ b/list/src/main/java/de/vivi/list/BubbleSort.java
@@ -0,0 +1,8 @@
+package de.vivi.list;
+
+public class BubbleSort implements ByteSort {
+    @Override
+    public void sort(ArrayByteList copy) {
+
+    }
+}
diff --git a/list/src/main/java/de/vivi/list/ByteList.java b/list/src/main/java/de/vivi/list/ByteList.java
index 07d587d..120fc16 100644
--- a/list/src/main/java/de/vivi/list/ByteList.java
+++ b/list/src/main/java/de/vivi/list/ByteList.java
@@ -1,6 +1,6 @@
 package de.vivi.list;
 
-public interface ByteList {
+public interface ByteList extends Iterable {
     void add(byte value);
 
     void add(int index, byte value);
@@ -13,11 +13,14 @@ public interface ByteList {
 
     int size();
 
-    boolean contains(byte value);
+    boolean contains(int value);
 
     String toString();
 
-    String copy();
+    ArrayByteList copy();
 
     void clear();
+
+    byte[] toArray();
+
 }
diff --git a/list/src/main/java/de/vivi/list/ByteSort.java b/list/src/main/java/de/vivi/list/ByteSort.java
new file mode 100644
index 0000000..76920fc
--- /dev/null
+++ b/list/src/main/java/de/vivi/list/ByteSort.java
@@ -0,0 +1,5 @@
+package de.vivi.list;
+
+public interface ByteSort {
+    void sort(ArrayByteList copy);
+}
diff --git a/list/src/main/java/de/vivi/list/CombinedByteList.java b/list/src/main/java/de/vivi/list/CombinedByteList.java
new file mode 100644
index 0000000..8bfa735
--- /dev/null
+++ b/list/src/main/java/de/vivi/list/CombinedByteList.java
@@ -0,0 +1,111 @@
+package de.vivi.list;
+
+import java.util.Arrays;
+import java.util.Iterator;
+
+public class CombinedByteList implements ByteList {
+
+    private int value;
+    private int size = 0;
+    private byte[] array;
+
+    public CombinedByteList(int value) {
+        this.value = value;
+    }
+
+    @Override
+    public void add(byte value) {
+        ++size;
+        if (size == 1) {
+            byte[] oldArray = new byte[size];
+            oldArray[size - 1] = value;
+            array = oldArray;
+            //System.out.println(Arrays.toString(arrayOld));
+        } else {
+            byte[] newArray = new byte[size];
+            System.arraycopy(array, 0, newArray, 0, size - 1);
+            newArray[size - 1] = value;
+            array = newArray;
+            //System.out.println(Arrays.toString(arrayNew));
+        }
+        //System.out.println(Arrays.toString(array));
+    }
+
+    @Override
+    public void add(int index, byte value) {
+        byte[] newArray = new byte[array.length + 1];
+        System.arraycopy(array, 0, newArray, 0, array.length);
+        for (int i = newArray.length - 1; i >= index; i--) {
+            newArray[i] = newArray[i - 1];
+        }
+        newArray[index] = value;
+        array = newArray;
+    }
+
+    @Override
+    public void remove(int index) {
+        for (int i = index; i < array.length - 1; i++) {
+            array[i] = array[i + 1];
+        }
+        byte[] newArray = new byte[array.length - 1];
+        System.arraycopy(array, 0, newArray, 0, array.length - 1);
+        array = newArray;
+    }
+
+    @Override
+    public void set(int index, byte value) {
+        byte[] newArray = new byte[array.length];
+        System.arraycopy(array, 0, newArray, 0, array.length);
+        newArray[index] = value;
+        array = newArray;
+    }
+
+    @Override
+    public byte get(int index) {
+        return array[index];
+    }
+
+    @Override
+    public int size() {
+        return array.length;
+    }
+
+    @Override
+    public boolean contains(int value) {
+        boolean isIndexInArray = false;
+        for (int i = 0; i < array.length; i++) {
+            if (array[i] == value) {
+                isIndexInArray = true;
+            }
+        }
+        return isIndexInArray;
+    }
+
+    public String toString() {
+        return Arrays.toString(array);
+    }
+
+    @Override
+    public ArrayByteList copy() {
+        ArrayByteList newArrayList = new ArrayByteList();
+        newArrayList.array = Arrays.copyOf(array, size);
+        return newArrayList;
+    }
+
+    @Override
+    public void clear() {
+        byte[] newArray = new byte[0];
+        System.arraycopy(array, 0, newArray, 0, 0);
+        array = newArray;
+    }
+
+    @Override
+    public byte[] toArray() {
+        return Arrays.copyOf(array, size);
+    }
+
+    @Override
+    public Iterator iterator() {
+        return null;
+    }
+}
diff --git a/list/src/main/java/de/vivi/list/LinkedByteList.java b/list/src/main/java/de/vivi/list/LinkedByteList.java
new file mode 100644
index 0000000..13dc286
--- /dev/null
+++ b/list/src/main/java/de/vivi/list/LinkedByteList.java
@@ -0,0 +1,106 @@
+package de.vivi.list;
+
+import java.util.Arrays;
+import java.util.Iterator;
+
+public class LinkedByteList implements ByteList {
+
+    private int size = 0;
+    private byte[] array;
+
+    @Override
+    public void add(byte value) {
+        ++size;
+        if (size == 1) {
+            byte[] oldArray = new byte[size];
+            oldArray[size - 1] = value;
+            array = oldArray;
+            //System.out.println(Arrays.toString(arrayOld));
+        } else {
+            byte[] newArray = new byte[size];
+            System.arraycopy(array, 0, newArray, 0, size - 1);
+            newArray[size - 1] = value;
+            array = newArray;
+            //System.out.println(Arrays.toString(arrayNew));
+        }
+        //System.out.println(Arrays.toString(array));
+    }
+
+    @Override
+    public void add(int index, byte value) {
+        byte[] newArray = new byte[array.length + 1];
+        System.arraycopy(array, 0, newArray, 0, array.length);
+        for (int i = newArray.length - 1; i >= index; i--) {
+            newArray[i] = newArray[i - 1];
+        }
+        newArray[index] = value;
+        array = newArray;
+    }
+
+    @Override
+    public void remove(int index) {
+        for (int i = index; i < array.length - 1; i++) {
+            array[i] = array[i + 1];
+        }
+        byte[] newArray = new byte[array.length - 1];
+        System.arraycopy(array, 0, newArray, 0, array.length - 1);
+        array = newArray;
+    }
+
+    @Override
+    public void set(int index, byte value) {
+        byte[] newArray = new byte[array.length];
+        System.arraycopy(array, 0, newArray, 0, array.length);
+        newArray[index] = value;
+        array = newArray;
+    }
+
+    @Override
+    public byte get(int index) {
+        return array[index];
+    }
+
+    @Override
+    public int size() {
+        return array.length;
+    }
+
+    @Override
+    public boolean contains(int value) {
+        boolean isIndexInArray = false;
+        for (int i = 0; i < array.length; i++) {
+            if (array[i] == value) {
+                isIndexInArray = true;
+            }
+        }
+        return isIndexInArray;
+    }
+
+    public String toString() {
+        return Arrays.toString(array);
+    }
+
+    @Override
+    public ArrayByteList copy() {
+        ArrayByteList newArrayList = new ArrayByteList();
+        newArrayList.array = Arrays.copyOf(array, size);
+        return newArrayList;
+    }
+
+    @Override
+    public void clear() {
+        byte[] newArray = new byte[0];
+        System.arraycopy(array, 0, newArray, 0, 0);
+        array = newArray;
+    }
+
+    @Override
+    public byte[] toArray() {
+        return Arrays.copyOf(array, size);
+    }
+
+    @Override
+    public Iterator iterator() {
+        return null;
+    }
+}
diff --git a/list/src/main/java/de/vivi/list/Main.java b/list/src/main/java/de/vivi/list/Main.java
index 4be482d..cbbbff8 100644
--- a/list/src/main/java/de/vivi/list/Main.java
+++ b/list/src/main/java/de/vivi/list/Main.java
@@ -1,33 +1,18 @@
 package de.vivi.list;
 
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
 
 public class Main {
 
     public static void main(String[] args) {
         ByteList array = new ArrayByteList();
-
-        /*byte[] byteArray = {0};
-        int newSize = byteArray.length;
-        byte[] newByte = new byte[newSize];
-        System.arraycopy(byteArray, 0, newByte, 0 , byteArray.length);
-        newByte[newSize - 1] = 4;
-        System.out.println(Arrays.toString(byteArray));
-        System.out.println(Arrays.toString(newByte));
-
-        int newSize2 = newByte.length + 1;
-        byte[] newByte2 = new byte[newSize2];
-        System.arraycopy(newByte, 0, newByte2, 0 , newByte.length);
-        newByte2[newSize2 - 1] = 5;
-        System.out.println(Arrays.toString(newByte));
-        System.out.println(Arrays.toString(newByte2));
-
-         */
-//        ByteList linked = new LinkedByteList();
-//        ByteList combined = new CombinedByteList(16);
+        ByteList linked = new LinkedByteList();
+        ByteList combined = new CombinedByteList(16);
         testListVivi(array);
-        // do some stuff with value...
-
+        testSortVivi(array);
         //testList(array);
 //        testList(linked);
 //        testList(combined);
@@ -50,10 +35,6 @@ public class Main {
         list.add(2, (byte) -40);
         System.out.println(list);
 
-        for (byte value : list) {
-            System.out.println(value + " ");
-        }
-
         list.remove(2);
         System.out.println(list);
         list.remove(3);
@@ -71,10 +52,10 @@ public class Main {
 
         list.size();
         System.out.println(list.size());
-        list.contains((byte) 43); // returns: true
-        System.out.println(list.contains((byte) 43));
-        list.contains((byte) 4);
-        System.out.println(list.contains((byte) 4));
+        list.contains(43); // returns: true
+        System.out.println(list.contains(43));
+        list.contains(4);
+        System.out.println(list.contains(4));
 
         String s  = list.toString();
         System.out.println(s);
@@ -82,9 +63,20 @@ public class Main {
         list.copy();
         System.out.println(list.copy());
 
+        ByteList list2 = list.copy();
+        list2.set(0, (byte) 6);
+        System.out.println(list2);
+
+        for (byte value : list.toArray()) {
+            System.out.println(value);
+        }
+
         list.clear();
         System.out.println(list);
 
+        for (byte value : list) {
+            System.out.println(value);
+        }
 
     }
 
@@ -156,4 +148,15 @@ public class Main {
     }
 
      */
+
+    private static void testSortVivi(ByteList list) {
+        ByteSort bubble = new BubbleSort();
+//        ByteSort merge = new MergeSort();
+//        ByteSort bogo = new BogoSort();
+
+        // sort the lists with the sorting algorithm
+        bubble.sort(list.copy());
+//        merge.sort(list.copy());
+//        bogo.sort(list.copy());
+    }
 }