Yesterday Will (my 10 year old) was working on creating a loop in Garage Band. He recorded via synthesizer a segment or phrase, and was trying to loop it, but he was having difficulty because he realized that in order to make a loop, you have to leave halves at the ends, so when they merge you don’t get a repeat at the beginning. Here’s his loop after a lot of trial and error (my title):
I was fascinated because it is the same process textile or wallpaper designers use in order to make repeat patterns. See this detail, below from: http://vector.tutsplus.com/tutorials/tools-tips/everything-you-ever-want-to-know-about-creating-seamless-patterns-in-illustrator/
1. Background Rectangle – In this method, the rectangle is placed below all other objects, so that all elements stay within its borders.
2. Dividing Objects – To crop the pattern, create a rectangle on top of all objects to match the tile. Now you have two options: either select all objects and press the Crop button in the Pathfinder panel, or select the top rectangle and go to Object > Path > Divide objects below and delete the leftovers. Now you can save the perfectly cropped pattern.
3. Invisible Borders – This method is the most advanced and popular. Create a rectangle matching the tile borders, make it NO fill and NO stroke (dark rectangle on the image below) and send it to back of the entire stack (Shift + Command+ [). This invisible shape will define the pattern borders, this way you can avoid dividing objects.
And the same process block printing with a repeat: