Divide the water evenly between two medium pots- 4 cups in each. To one pot of water, add 80 drops of food coloring- 77 yellow and 3 red.
Heat both pots of water over high heat to bring them to a boil.
Once the water comes to a boil, add half the pasta (2 cups) to one pot and the remaining half to the other. Reduce the heat and let the pasta simmer according to the package instructions, stirring occasionally, until cooked.
Drain the pasta completely of water, run it briefly under cool water tossing to evenly disperse, and then set it aside.
While the pasta cools, make the dressing. To a large mixing bowl, add the mayo, vinegar, sugar, mustard, salt, & pepper. Whisk together until the mixture's smooth. Refrigerate just until the pasta's cool.
Add the cooked pasta to the dressing, tossing until evenly coated.
Add in the onion, celery, and olives- again tossing just until everything's evenly incorporated.
Serve and enjoy!