diff --git a/decorator/classdecor.py b/decorator/classdecor.py
new file mode 100644
index 0000000..8b9be04
--- /dev/null
+++ b/decorator/classdecor.py
@@ -0,0 +1,25 @@
+# Datei: classdecor.py
+
+
+def addrepr(cls):
+# Universelle __repr__ Methode
+  def __repr__(self):
+        return f"{cls.__name__}({self.__dict__})"
+  cls.__repr__ = __repr__
+    
+  return cls
+
+@addrepr
+class Fahrzeug():
+ def __init__(self,farbe,typ):
+   self.typ = typ
+   self.farbe = farbe
+
+
+f1 = Fahrzeug('grau','VW')
+f2 = Fahrzeug('rot','Ferrari')
+
+print(f'{f1}')
+print(f'{f2}')
+   
+
diff --git a/decorator/counter.py b/decorator/counter.py
new file mode 100644
index 0000000..28bb820
--- /dev/null
+++ b/decorator/counter.py
@@ -0,0 +1,13 @@
+#Datei: counter.py
+
+def counter(func):
+  func.count = 0 
+  def wrapper(*args, **kwargs):
+    func.count = func.count +1
+    print(f'{func.__name__} wurde {func.count}-mal aufgerufen.')
+    result = func(*args,**kwargs)
+
+    return result
+  wrapper.count = 0
+  return wrapper
+
diff --git a/decorator/fib.py b/decorator/fib.py
index 6626a5e..0e69fa2 100644
--- a/decorator/fib.py
+++ b/decorator/fib.py
@@ -1,6 +1,11 @@
+#Datei: fib.py
 
+import functools
 import sys
+from counter import counter
 
+#@functools.cache
+@counter
 def fib(n):
  if n in [0,1]:
    return n
@@ -8,5 +13,4 @@ def fib(n):
    return fib(n-1) + fib(n-2)
 
 
-print(fib(int(sys.argv[1])))
 
diff --git a/decorator/func_param.py b/decorator/func_param.py
index 76064b9..c6f4286 100644
--- a/decorator/func_param.py
+++ b/decorator/func_param.py
@@ -1,8 +1,16 @@
+# Datei: func_param.py
+
 def add(x, y):
-    return x + y
+  return x + y
+
+def mul(x,y):
+  return x * y
 
 def calculate(func, x, y):
     return func(x, y)
 
-result = calculate(add, 4, 6)
-print(result)  # prints 10
+result = calculate(add, 4, 6) # Aufruf von calculate mit add Funktion als Parameter
+print(result)  # Ausgabe ist 10
+
+result = calculate(mul, 4, 6) # Aufruf von calculate mit add Funktion als Parameter
+print(result)  # Ausgabe ist 24
diff --git a/decorator/nested_function.py b/decorator/nested_function.py
index afac62f..9a8507c 100644
--- a/decorator/nested_function.py
+++ b/decorator/nested_function.py
@@ -1,12 +1,12 @@
-
+#Datei: nested_function.py
 
 def print_message(message):
-    "Umgebende Function"
-    def message_sender():
-        "Eingebettete Function"
+    print('Umgebende Funktion')
+    def inner_function():
+        print('Eingebettete Funktion')
         print(message)
 
-    message_sender()
+    inner_function()
 
-print_message("Some random message")
+print_message("Irgendein Text")
 
diff --git a/decorator/pass_func.py b/decorator/pass_func.py
index eca999c..bf9112c 100644
--- a/decorator/pass_func.py
+++ b/decorator/pass_func.py
@@ -2,7 +2,7 @@ def make_pretty(func):
     # define the inner function 
     def inner():
         # add some additional behavior to decorated function
-        print("I got decorated")
+        print("Dies ist die innere Funktion.")
 
         # call original function
         func()
@@ -11,7 +11,7 @@ def make_pretty(func):
 
 # define ordinary function
 def ordinary():
-    print("I am ordinary")
+    print("Dies ist die ordinary() Funktion.")
     
 # decorate the ordinary function
 decorated_func = make_pretty(ordinary)
diff --git a/decorator/reverse.py b/decorator/reverse.py
new file mode 100644
index 0000000..3bea71d
--- /dev/null
+++ b/decorator/reverse.py
@@ -0,0 +1,17 @@
+
+
+def reverse_decorator(func): 
+  
+    def wrapper(text): 
+        make_reverse = "".join(reversed(text)) 
+        return func(make_reverse)
+  
+    return wrapper 
+
+@reverse_decorator
+def format_message(text):
+  return f'Text: {text}'
+
+print(format_message('Hallo'))
+
+  
diff --git a/decorator/static.py b/decorator/static.py
new file mode 100644
index 0000000..245fa60
--- /dev/null
+++ b/decorator/static.py
@@ -0,0 +1,20 @@
+# Datei static.py
+
+class Math():
+  
+ @staticmethod
+ def add(x,y):
+   return x+y
+
+ @staticmethod
+ def sub(x,y):
+   return x-y
+
+ @staticmethod
+ def mul(x,y):
+   return x*y
+
+
+print(f'Add: {Math.add(3,2)}')
+print(f'Sub: {Math.sub(3,2)}')
+print(f'Mul: {Math.mul(3,2)}')
diff --git a/decorator/timer.py b/decorator/timer.py
index a465e51..8ca1d4a 100644
--- a/decorator/timer.py
+++ b/decorator/timer.py
@@ -1,5 +1,9 @@
+#Datei: timer.py
 
+from fib import fib
+from counter import counter
 import time
+import sys
 
 def timer(func):
   def wrapper(*args, **kwargs):
@@ -16,6 +20,9 @@ def timer(func):
 def summe(n):
   return f"Summe: {sum(range(n))}"
 
+@timer
+def calc_fib(n):
+  return fib(n)
 
 print(summe(1000000))
-
+print(calc_fib(int(sys.argv[1])))