diff --git a/DZ1/ArrayList_Sequence.py b/DZ1/ArrayList_Sequence.py
new file mode 100644
index 0000000..8856646
--- /dev/null
+++ b/DZ1/ArrayList_Sequence.py
@@ -0,0 +1,122 @@
+from array import array
+
+
+class Iterator:
+    """Итератор для прохождения по коллекции"""
+
+    def __init__(self, collection, start=0, end=-1, step=1):
+        self.collection = collection
+        if start < 0:
+            self.start = len(collection) + start
+        else:
+            self.start = start
+        if end < 0:
+            self.end = len(collection) + end + step
+        else:
+            self.end = end + step
+        self.step = step
+        self.current = self.start
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if self.current == self.end:
+            raise StopIteration
+        current = self.collection[self.current]
+        self.current += self.step
+        return current
+
+
+class ArrayList:
+    def __init__(self, type, init_list=[]):
+        self.data = array(type, init_list)
+
+    def __getitem__(self, item):
+        return self.data[item]
+
+    def __len__(self):
+        return len(self.data)
+
+    def __contains__(self, item):
+        for i in range(len(self.data)):
+            if item == self.data[i]:
+                return True
+        return False
+
+    def __iter__(self):
+        return Iterator(self.data)
+        # return (self.data[i] for i in range(len(self.data)))
+
+    def __reversed__(self):
+        # for i in range(len(self.data)):
+        #    yield self.data[len(self.data)-i]
+        #return (self.data[len(self.data) - 1 - i] for i in range(len(self.data)))
+        return Iterator(self.data, -1, 0, -1)
+
+    def index(self, item):
+        for i in range(len(self.data)):
+            if item == self.data[i]:
+                return i
+        raise ValueError
+
+    def count(self, item):
+        counter = 0
+        for i in range(len(self.data)):
+            if self.data[i] == item:
+                counter += 1
+        return counter
+
+
+if __name__ == "__main__":
+    my_array1 = ArrayList('l', [1, 2, 2, 3, 4, 5])
+    my_array2 = ArrayList('d', [1.5, 7.7, 123.1])
+    my_array3 = ArrayList('u', ['s', 't', 'r', 'i', 'n', 'g'])
+
+    # Проверка получения значения по индексу
+    print('my_array1[0] = {}'.format(my_array1[0]))
+    print('my_array2[1] = {}'.format(my_array2[1]))
+    print('my_array3[2] = {}'.format(my_array3[2]))
+
+    # Проверка длины
+    print('len my_array1 = {}'.format(len(my_array1)))
+    print('len my_array2 = {}'.format(len(my_array2)))
+    print('len my_array3 = {}'.format(len(my_array3)))
+
+    # Проверка вхождения элементов
+    print('10 in [1,2,2,3,4,5] -> {}'.format(10 in my_array1))
+    print('1.5 in [1.5, 7.7, 123.1] -> {}'.format(1.5 in my_array2))
+    print("'g' in ['s','t','r','i','n','g'] -> {}".format('g' in my_array3))
+
+    # Проверка итераторов
+    for v in my_array1:
+        print(v, end=' ')
+    print()
+    for v in my_array2:
+        print(v, end=' ')
+    print()
+    for v in my_array3:
+        print(v, end=' ')
+    print()
+    itr = iter(my_array1)
+    while True:
+        try:
+            print(next(itr), end=' ')
+        except StopIteration:
+            break
+    print()
+
+    # Переворот массивов
+    print("Reversed [1,2,2,3,4,5] is {}".format(list(reversed(my_array1))))
+    print("Reversed [1.5, 7.7, 123.1] is {}".format(list(reversed(my_array2))))
+    print("Reversed ['s','t','r','i','n','g'] is {}".format(list(reversed(my_array3))))
+
+    # Проверка вхождений индекса
+    print("3 on the {} place in [1,2,2,3,4,5]".format(my_array1.index(3)))
+    print("7.7 on the {} place in [1.5, 7.7, 123.1]".format(my_array2.index(7.7)))
+    print("i on the {} place in ['s','t','r','i','n','g']".format(my_array3.index('i')))
+
+    # Проверка количества элементов
+    print("count of 2 in [1,2,2,3,4,5] is {}".format(my_array1.count(2)))
+    print("count of 1.1 in [1.5, 7.7, 123.1] is {}".format(my_array2.count(1.1)))
+    print("count of n in ['s','t','r','i','n','g'] is {}".format(my_array3.count('n')))