diff --git a/chunker.py b/chunker.py
new file mode 100644
index 0000000..6437370
--- /dev/null
+++ b/chunker.py
@@ -0,0 +1,11 @@
+def chunker(it, n):
+    it = iter(it)
+    while 1:
+        chunk = tuple(x[1] for x in zip(range(n), it))
+        if not chunk:
+            break
+        yield chunk
+
+
+for chunk in chunker(range(25), 4):
+    print(list(chunk))
diff --git a/my_range_gen_3.py b/my_range_gen_3.py
new file mode 100644
index 0000000..6985498
--- /dev/null
+++ b/my_range_gen_3.py
@@ -0,0 +1,24 @@
+from operator import gt, lt
+
+
+def my_range_gen(start, stop=None, step=1):
+    if stop is None:
+        start, stop = 0, start
+
+    if (
+        not step
+        or start == stop
+        or (step > 0 and start > stop)
+        or (step < 0 and start < stop)
+    ):
+        return
+
+    x, op = start, start > stop and gt or lt
+    while op(x, stop):
+        yield x
+        x += step
+
+
+for i in my_range_gen(20, 10, 3):
+    print(i)
+print("End")