diff --git a/pyproject.toml b/pyproject.toml
index f89db5e..604df71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ readme = "README.md"
 packages = [{include = "lab_iteration"}]
 
 [tool.poetry.dependencies]
-python = "^3.11"
+python = "^3.10"
 
 
 [build-system]
diff --git a/square.py b/square.py
new file mode 100644
index 0000000..7f522e9
--- /dev/null
+++ b/square.py
@@ -0,0 +1,9 @@
+from turtle import *
+
+def square(side_length):
+    for _ in range (4):
+        forward(side_length)
+        right(90)
+
+square(40)
+done()
\ No newline at end of file