It's not like writing where it grabs a virtual pen and draws the letters one by one, or types the letters one by one. The image is diffused everywhere at once, and if you for example close your eyes and imagine the word "generation" in symbols as an image, it's quite difficult to visualise all the details in the right order in the right detail and so on. The model does it in multiple layers but starts with a slightly defined "hunch" in full image size and just makes the initial hunch more legible with each layer
