This is a test of commonsense. Complete the next sentence:

How to make a colorful roll up cake
Split and color your cake mix appropriately.
If you were using the colors from the bisexual cake you would split your mixture into three bowls. Then color one pink, one purple and, one blue.
Spread your colored mixture onto a greased jelly tray, or something similar, using a piping bag. Feel free to use any pattern that appeals to your interest.