Apparently, like icons, pysanky are written, not drawn. There is lots of symbolism in the designs. The first found wax resist dyed egg dates from about the 15th century. There are decorated eggs found from the neolithic era, although they are made of ceramic. There is an ancient history for decorated eggs, that is for sure.
All the areas which you want to be white are covered with wax first. The the egg is dipped into the first colour. Once the egg is dyed to the desired depth of colour, it is removed from the dye and allowed to dry. Then the areas which you want to be the next colour are covered with wax. Here the orange egg has been dyed twice, with the white, yellow and orange areas covered with wax. The dyes need to be applied in a particular order. Green can contaminate other colours so is often painted in areas specifically and then covered, rather than dipping the whole egg in the dye. Blue and green are usually dyed before red, but the blue will make the red turn a bit purple, so it is useful to plan out the colours ahead of time. Brown eggs may not show all the colours clearly and the colours won't be as bright s on white eggs.
I've 6 finished, although I really made 8, but 2 had cracks in them. I might have time to make 1 or 2 more before I need them to fill the Easter Basket.