Arduino programmer to Hire! personal project

I'm stuck at a project that i'm trying to do. I'm looking for a programmer to hire to help me with that.
I need to have four button or piezzo sensors combination lock.

So I want to make very simple 4 button (or sensors) arduino lock.
If yo press buttons in correct order Green LED should light up, if any other combination is pressed
red LED shoul light up.

Hi paparazzit,

That looks fairly straightforward -- see my PM for details.