In large bowl, beat shortening and vanilla with electric mixer on medium speed until light and fluffy. Reduce speed to low. Add powdered sugar, 1 cup at a time, beating after each addition. Once half of the sugar has been added, gradually beat in milk. Add remaining 4 cups powdered sugar, 1 cup at a time, beating after each addition until blended and frosting is smooth. On spoon, place 8 small dots red food color and 1 small dot blue food color. Add food color to frosting; beat until frosting is an even rose color.