diff --git a/Draw-Patten-Using-Loop/pattern.py b/Draw-Patten-Using-Loop/pattern.py
new file mode 100644
index 0000000..6e364e8
--- /dev/null
+++ b/Draw-Patten-Using-Loop/pattern.py
@@ -0,0 +1,7 @@
+N = int(input('enter number'))
+number = N+1
+for _ in range(N):
+    print()
+    number=number-1
+    for i  in reversed(range(1,N+1)):     
+        print(str(i)*number,end="")
diff --git a/HacktoberfestHackDay2018 b/HacktoberfestHackDay2018
new file mode 160000
index 0000000..b8d27d2
--- /dev/null
+++ b/HacktoberfestHackDay2018
@@ -0,0 +1 @@
+Subproject commit b8d27d24a48758d9678354b377839b37908268e7
diff --git a/List-Operation/ChiragPatil/stackUsingList.py b/List-Operation/ChiragPatil/stackUsingList.py
new file mode 100644
index 0000000..8194e58
--- /dev/null
+++ b/List-Operation/ChiragPatil/stackUsingList.py
@@ -0,0 +1,52 @@
+class st:
+    def __init__(self):
+        self.stack = []
+    
+    def push(self,item):
+        self.stack.insert(len(self.stack),item)
+                
+    def pop(self):
+        if len(self.stack)==0:
+            print('Stack is empty')
+        else:
+            print(self.stack[-1])
+            self.stack.remove(self.stack[-1])
+            
+    
+    def peek(self):
+        if len(self.stack)!=0:
+            print(self.stack[-1])
+    
+    def isEmpty(self):
+        if len(self.stack)!=0:
+            return False
+        else:
+            return True
+    
+    def display(self):
+        print(self.stack)
+        
+s = st() 
+
+while True:
+    print('\npush <value>')
+    
+    print('pop')
+    print('quit')
+    print('display')
+    print('peek')
+    do = input('What would you like to do? ').split()
+ 
+    operation = do[0].strip().lower()
+    if operation == 'push':
+        s.push(int(do[1]))
+    elif operation == 'pop':
+         s.pop()
+    elif operation == 'display':
+        s.display()
+    elif operation == 'isEmpty':
+        s.isEmpty()
+    elif operation == 'peek':
+        s.peek()
+    elif operation == 'quit':
+        break