diff --git a/for.py b/for.py
new file mode 100644
index 0000000..778dd6e
--- /dev/null
+++ b/for.py
@@ -0,0 +1,21 @@
+class Foo:
+    def __init__(self, len: int):
+        self.len = len
+    
+    def __getitem__(self, key: int):
+        return key
+    
+    def __len__(self):
+        return self.len
+
+for i in Foo(12):
+    print(i)
+
+    if i > 1000:
+        break
+
+print(*reversed(Foo(12)), sep = " ")
+
+Foo.__len__ = lambda self: self.len ** 2
+
+print(*reversed(Foo(12)), sep = " ")
\ No newline at end of file