Color 1 portion red with about 15 drops of food coloring. Color 1 portion blue with about 15 drops of food coloring.
Transfer each color to a zippered sandwich bag. Clip the corner of the blue and pipe it equally into the bottom of 5 3 oz Dixie cups.
Lift and gently tap each cup on the counter to level up the pudding. Repeat this process with the white and then red colors.