Refactor colors

The order of addition of the colors on the Turtle didn't match the order of keys in the HasMap. Students would usually get confused about that. This is Fixed now.

Turtle.java

@@ -32,7 +32,8 @@ import java.util.TreeMap;
  * @author Axel Schmolitzky
  * @author Fredrik Winkler
  * @author Clara Marie Lueders
- * @version 5. Dezember 2018
+ * @author Volodymyr Biryuk
+ * @version 29. November 2023
  */
 public class Turtle
 {
@@ -83,8 +84,6 @@ public class Turtle
     public Turtle()
     {
         this(TurtleWelt.WIDTH / 2, TurtleWelt.HEIGHT / 2);
-        System.out.println(FARBEN);
-        System.out.println(FARBEN.keySet());
     }
 
     /**