to create panel in which questions can be switched

Question

Hello,

I want to create a panel which is generated randomly as total no of questions can change, and in panel student can switch to question , if answered its color changes to green is viewed and not answered then color changes to orange and if not viewed is defined by default color. 

Please suggest me how to approach on this concept,

as i tired creating individual button , but that is complicating as number of questions are also changing.