01 - 
                Cook rotini pasta according to package instructions until al dente. Drain using a colander.
              
              
              
                02 - 
                In two Ziploc bags, add red food coloring with water in one bag and blue food coloring in another.
              
              
              
                03 - 
                Divide the drained pasta into three equal portions. Place one-third in each bag (one red, one blue), seal, and gently knead until evenly colored.
              
              
              
                04 - 
                Toss the remaining third of the pasta with olive oil to prevent color absorption.
              
              
              
                05 - 
                In a large mixing bowl, combine all colored pasta, cherry tomatoes, mozzarella cheese, pepperoni, black olives, and Italian dressing. Mix until well combined.
              
              
              
                06 - 
                Cover and chill in the refrigerator for at least one hour before serving.