duplicates of stacking squares of gradating colours from bright red to yellow to white against white backdrop

six two row rows three column columns duplicate duplication duplicates repeat pattern patterns white backdrop background stack stacking stacks square squares gradate gradating colour colours colors color bright light dark red orange yellow beige maroon optical optic optics illusion trick eye vision view big bigger small smallers size sized sizes compare comparison top one pyramid zoom zooming horizon equal identical area areas surface surfaces inside perimeter perimeters volume volumes geometry geometrical