Click "Edit Mode" to enter the edit mode. Click and hold on a node and drag it to move it around, or single click to move it around then click again to place it. Double click on a line between nodes to insert a new node. It will be the color you have selected. To change colors, click on a color at the bottom then click on the line you wish to change. When you are done creating your seed shape, click on "Iterate Mode" and move from "Iter 1" on up to eight to see the fractal take shape!
Purple: Invert and Flip
Green: Passive Line
Delete/Backspace Key: Delete Node