Answer 1

Heyo, just so you know, your post needs a little more information,
1. A language needs specified so we can show you how
2. You should supply code that you have created to try and solve it even if you dont know exactly how, try to express it as best you can.
3. this is a pretty common question on the forums, a search of q&a might provide you the answers you are looking for or atleast get you on the right track.
And lastly, this is a very helpful community full of people who care about spreading knowledge and ensuring others can grow, but if you dont put more effort in yourself by following the steps i mentioned, you most likely won't get any constructive feedback to help you improve.