Inventory system

Hi,
I am currently creating inventory system and I have it stored in save file and in memory of game in list<int>, like list[0] = 10 (10 x "0" items). I want to create inventory that looks something like this

Code (CSharp):

1.     x   x   x   x   x   x
2.     x   x   x   x   x   x
3. //<buttons for left||right>
4.  
5. //or maybe swipe
6.  
7. //or scroll bar/swipe for up/down is also good

I am interested how to show to player that inventory (x represents image of object and number of objects). I thought about creating 10-20 (how much can go to screen) images and change them based on page of inventory or something like that.

Any kind of tutorial or explanation is welcome. I searched but without succes

 

There is a free inventory system available in the Asset Store.