diff --git a/Week04/decorators_aygul_ozkeklik.py b/Week04/decorators_aygul_ozkeklik.py
new file mode 100644
index 00000000..a1b7b540
--- /dev/null
+++ b/Week04/decorators_aygul_ozkeklik.py
@@ -0,0 +1,25 @@
+import time
+import tracemalloc
+
+def performance(fn):
+    performance.counter = 0
+    performance.total_time = 0
+    performance.total_mem = 0
+
+    def wrapper(*args, **kwargs):
+        performance.counter += 1
+
+        start = time.time()
+        tracemalloc.start()
+        result = fn(*args, **kwargs)
+        end = time.time()
+
+        _, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+
+        performance.total_time += (end - start)
+        performance.total_mem += peak
+
+        return result
+
+    return wrapper