Line two baking sheets (that will fit in your refrigerator) with wax paper.
Chop 14 ounces white chocolate if using a bar and not candy melts or wafers.
Melt the white chocolate. I use the microwave (15-second spurts mixing well between each). Or use a double boiler.
Pour about ¼ cup of melted white chocolate into a small bowl or more, depending on the number of colored chocolate you want to make. I used light green and sometimes mix it with pink or blue.
Sprinkle oil-based food coloring in pastel colors and integrate well. Depending on your brand of coloring (mine was a powder), you might need more or less to get the type of hue you want. Start small, with a pinch, mix well and add more if necessary. If you want several colored chocolates, you might need to melt more white chocolate than specified in the recipe.
Pour the remaining white chocolate on the prepared baking sheet, making a log in the center.
Spread it on the paper with an offset spatula or the back of a spoon. Don't make it too thick, or it will be hard to break up. Between ⅛ and ¼ inch is what you want.
Drizzle the colored chocolate/s of choice. Don't overdo it.
Sprinkle with ½ cup assorted sprinkles, chopped mini eggs or other edibles you might've chosen. You can drizzle some extra chocolate after sprinkling the candies. There's no right or way to do this; whatever you like is fine.
Refrigerate for about 20 minutes until completely hardened. The time depends on the thickness and the temperature of your fridge.
Separate the cold chocolate rectangle carefully from the paper.
Break into pieces by hand or use a kitchen knife to cut pieces.