diff --git a/Week04/decorators_basak_kocan.py b/Week04/decorators_basak_kocan.py
new file mode 100644
index 00000000..cd57229a
--- /dev/null
+++ b/Week04/decorators_basak_kocan.py
@@ -0,0 +1,25 @@
+import time
+import tracemalloc
+
+def performance(fn):
+  setattr(performance, 'counter', 0)
+  setattr(performance, 'total_time', 0)
+  setattr(performance, 'total_mem', 0)
+
+  def wrapper(*args, **kwargs):
+    setattr(performance, 'counter', performance.counter +1)
+
+    start_time = time.time()
+    tracemalloc.start()
+    result = fn(*args, **kwargs)
+
+    end_time = time.time()
+    current, peak = tracemalloc.get_traced_memory()
+    tracemalloc.stop()
+
+    setattr(performance, 'total_time', performance.total_time + (end_time - start_time))
+    setattr(performance, 'total_mem', performance.total_mem + peak)
+    
+    return result
+
+  return wrapper