transformation using grids

Today we found an accredited image on Explore and selected it to use on our page. We then put a 5x5 grid on it so we could copy the image and make it original. Mrs Minehan selected the first two images so we could understand the process, then we got to choose our own image.
I found the first one  difficult but I tried at least
I chose the image of a Maori symbol  because it is my country
Have you ever tried to transform an image using a grid? How did you find the process?