diff --git a/list/src/main/java/de/vivi/list/ArrayByteList.java b/list/src/main/java/de/vivi/list/ArrayByteList.java
new file mode 100644
index 0000000..d30b4ee
--- /dev/null
+++ b/list/src/main/java/de/vivi/list/ArrayByteList.java
@@ -0,0 +1,96 @@
+package de.vivi.list;
+
+import java.util.Arrays;
+
+public class ArrayByteList 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(byte 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 String copy() {
+        byte[] newArray = new byte[array.length];
+        System.arraycopy(array, 0, newArray, 0, array.length);
+        array = newArray;
+        return Arrays.toString(newArray);
+    }
+
+    @Override
+    public void clear() {
+        byte[] newArray = new byte[0];
+        System.arraycopy(array, 0, newArray, 0, 0);
+        array = newArray;
+    }
+}
diff --git a/list/src/main/java/de/vivi/list/ByteList.java b/list/src/main/java/de/vivi/list/ByteList.java
new file mode 100644
index 0000000..07d587d
--- /dev/null
+++ b/list/src/main/java/de/vivi/list/ByteList.java
@@ -0,0 +1,23 @@
+package de.vivi.list;
+
+public interface ByteList {
+    void add(byte value);
+
+    void add(int index, byte value);
+
+    void remove(int index);
+
+    void set(int index, byte value);
+
+    byte get(int index);
+
+    int size();
+
+    boolean contains(byte value);
+
+    String toString();
+
+    String copy();
+
+    void clear();
+}
diff --git a/list/src/main/java/de/vivi/list/Main.java b/list/src/main/java/de/vivi/list/Main.java
index d418547..4be482d 100644
--- a/list/src/main/java/de/vivi/list/Main.java
+++ b/list/src/main/java/de/vivi/list/Main.java
@@ -1,26 +1,94 @@
 package de.vivi.list;
 
+import java.util.Arrays;
+
 public class Main {
 
     public static void main(String[] args) {
         ByteList array = new ArrayByteList();
-        ByteList linked = new LinkedByteList();
-        ByteList combined = new CombinedByteList(16);
 
-        testList(array);
-        testList(linked);
-        testList(combined);
+        /*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));
 
-        testSort(array);
-        testSort(linked);
-        testSort(combined);
+        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);
+        testListVivi(array);
+        // do some stuff with value...
+
+        //testList(array);
+//        testList(linked);
+//        testList(combined);
+
+//        testSort(array);
+//        testSort(linked);
+//        testSort(combined);
     }
 
-    private static void testListVivi() {
+    private static void testListVivi(ByteList list) {
+        list.add((byte) 10);
+        list.add((byte) 5);
+        list.add((byte) -86);
+        list.add((byte) 3);
+
+        System.out.println(list);
+
+        list.add(3, (byte) 99);
+        System.out.println(list);
+        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);
+        System.out.println(list);
+
+        list.set(1, (byte) 43);
+        System.out.println(list);
+        list.set(0, (byte) 8);
+        System.out.println(list);
+
+        list.get(2);
+        System.out.println(list.get(2));
+        list.get(1);
+        System.out.println(list.get(1));
+
+        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));
+
+        String s  = list.toString();
+        System.out.println(s);
+
+        list.copy();
+        System.out.println(list.copy());
+
+        list.clear();
+        System.out.println(list);
+
 
     }
 
-    private static void testList(ByteList list) {
+    /*private static void testList(ByteList list) {
         // add the element at the end
         list.add((byte) 10);
         list.add((byte) 5);
@@ -86,4 +154,6 @@ public class Main {
         merge.sort(list.copy());
         bogo.sort(list.copy());
     }
+
+     */
 }