There are many ways to deal with a wall. You can poke a hole in it, you can climb over it, you can insert a window or a door and go through it. The embroidered spheres, pretend to be bubbles so that they can either float over it, imperviously, or sink to the ground, seeping under the floorboards. They find strength in numbers, creating concentric rings of themselves. They are a fungus that attacks the wall, gradually wearing down its resistance, or they are healthy cells repairing damage to the wall.