Lena noticed that some of the custom icons for the developer dashboard were appearing sideways after being uploaded. She decided to build a small utility to flip these square images ninety degrees to the right so they would display correctly. Mark reviewed her plan and suggested she shuffle the pixels within the existing grid rather than generating a brand new one to keep the utility lightweight. As an example, a simple layout with 1, 2, 3 in the first row should be transformed so that 1, 2, 3 becomes the very last column on the right.