high level language

Hi there everyone
I must confess, I'm sinking a bit with this one, so I thought I could get some advice from you guys. I have writen an small engine in c# that does the basic creation, minipulation and setting of properties for basic 2d geometric objects (sphere, cube and triangles). Now I need to write a "very high level language" that would enable a user to write code in a text file to manipulate these objects. It is really more a large set of instructions than a language. My question is basically what my train of thought should be. Am I looking at a huge list of if/case statements combined with loops and arrays or what?
I know my question is very vague/ambigious, but I hope you understand a little what I mean...
Thanks in advance
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