https://kids.frontiersin.org/article/10.3389/frym.2013.00010
https://www.easystereogrambuilder.com/how-stereograms-work.
https://www.lifewire.com/color-perception-and-your-tv-1847329
https://www.mentalfloss.com/article/54448/5-color-illusions-and-why-they-work
