I want to create a custom pen kit with various styles of pens (ball point, fountain, brush pen) that the user can select and draw using in my note application. The pen kit should work with Apple Pencil and utilize the pencil's force and angle inputs for changing the width of the line. I also want to have an eraser tool (to erase strokes), a lasso tool (for moving the strokes selected by the lasso tool), and a ruler. The pen kit should also allow for undo/redo and zoom. For some reference, the pen kit should be similar to those used by apps like Goodnotes or Notability (they can be downloaded for free on the iOS and Mac App Store).