Problem Statement

Produce an ASCII representation of a Sierpinski triangle of order   N.

The Sierpinski triangle of order   4   should look like this:

Let's start with the solution:

Sierp ← {" •" ⊏˜ (⌽↕2⋆𝕩)⌽˘∾˘∾⟜0¨∧´∘∨⌜˜⥊↕2⥊˜𝕩}