diff --git a/Week03/pyramid_okay_sezer.py b/Week03/pyramid_okay_sezer.py
new file mode 100644
index 00000000..e1678b39
--- /dev/null
+++ b/Week03/pyramid_okay_sezer.py
@@ -0,0 +1,9 @@
+def calculate_pyramid_height(number_of_blocks):
+    height = 0
+    blocks_needed = 1 # The number of blocks needed for the current level
+
+    while number_of_blocks >= blocks_needed: 
+        number_of_blocks -= blocks_needed # Use the needed blocks for the current level
+        height += 1 # Move to the next level
+        blocks_needed +=1 # The next level will require one more block than the current level
+    return height
\ No newline at end of file
diff --git a/Week03/sequences_okay_sezer.py b/Week03/sequences_okay_sezer.py
new file mode 100644
index 00000000..70641de6
--- /dev/null
+++ b/Week03/sequences_okay_sezer.py
@@ -0,0 +1,21 @@
+def remove_duplicates(seq: list) -> list:
+    list = []
+    for item in seq:
+        if item not in list:
+            list.append(item)
+    return list
+
+def list_counts(seq: list) -> dict:
+    dict = {}
+    for item in seq:
+        if item in dict:
+            dict[item] += 1
+        else:
+            dict[item] = 1
+    return dict
+
+def reverse_dict(d: dict) -> dict:
+    reversed_dict = {}
+    for key, value in d.items():
+        reversed_dict[value] = key
+    return reversed_dict