Light marks can be made with a pencil, but do not try to erase them as the erased areas will not take dye properly. Also be aware that if the pencil marks are in areas that will be left white they may show on the finished egg. Despite these caveats, such marks can be very helpful in charting your design. Continue through each color needed ending up in a dark color such as black, navy blue or red. An interesting fact is that green dyes should be applied with q-tips rather than by immersion if only a small area is to be green.
Orange dye dissolves most other colors.
I mix two jars of orange - one for dying eggs and one for rinsing. You can actually start out in one color group and then wash off a dark dye after waxing, go back to a lighter color and finish with a different color sequence. Once the wax has been removed the egg can be varnished. Traditionally pysanky eggs are not blown, but many people prefer to blow the finished egg. For unblown eggs it is said that if it survives its first year it will last forever.