english: If we abstract this process, and simplify it as much as possible, then we could start with a single sheet of paper, one surface, and we could make a fold and divide the surface into two surfaces.
non_english: Ako izdvojimo ovaj proces i pojednostavimo ga koliko je moguće, onda možemo početi sa jednim listom papira, jednom površinom i možemo ga presaviti i podeliti površinu na dve površine.