Its requests were:
-The slider must contain at least 3 images;
-It must have the "previous" and "next" button (in the arrow form positioned above the slider itself);
-Support for the slider to partially occupy the screen width (display 2 slides at a time);
-Support for arbitrary image size;
-Infinite sequence: make the buttons able to slide infinitely seeming to have an infinite sequence of images in both directions.
** None framework or library is allowed to be used but jQuery one.