diff --git a/Week04/arrays_ozge_ucar.py b/Week04/arrays_ozge_ucar.py
new file mode 100644
index 0000000..831d399
--- /dev/null
+++ b/Week04/arrays_ozge_ucar.py
@@ -0,0 +1,17 @@
+import numpy as np
+def replace_center_with_minus_one(d, n, m):
+    if m > n:
+        raise ValueError()
+    if d <= 0:
+        raise ValueError()
+    if n <= 0 or m <= 0:
+        raise ValueError()
+
+    max_value = 10 ** d - 1
+    main_array = np.random.randint(low=0, high=max_value + 1, size=(n, n))
+
+    start_index = (n - m) // 2
+    end_index = start_index + m
+    main_array[start_index:end_index, start_index:end_index] = -1
+
+    return main_array