diff --git a/main.py b/main.py
new file mode 100644
index 0000000..96c32f7
--- /dev/null
+++ b/main.py
@@ -0,0 +1,33 @@
+def countdown():
+    yield from [x for x in range(10, -1, -1)]
+
+
+def eng_alphabet():
+    yield from [chr(ch) for ch in range(ord('a'), ord('z')+1)]
+
+
+def fib(limit):
+    last_num, new_num = 0, 1
+    for _ in range(limit):
+        yield last_num
+        last_num, new_num = new_num, last_num + new_num
+
+
+def fib_iteration(limit=10):
+    data = fib(limit=limit)
+    print("Method 1:", end=" ")
+    for el in data:
+        print(el, end=" ")
+    print("\nMethod 2:", end=" ")
+
+    data = fib(limit)
+    while True:
+        print(next(data), end=" ")
+
+
+def even_nums(limit=21):
+    yield from [num for num in range(limit) if num % 2 == 0]
+
+
+def task6(start=1, limit=24):
+    return {key: chr(value) for key, value in zip(range(start, limit), range(ord('a'), ord('a') + limit))}