Here’s another one, with a different UserInterface, now a grid, rotatable and adjustable rectangles, in case you have to match clips…
As an example, 4 clips to be arranged …
Drag the Generator into the timeline, over the clips.-
When you move the mouse to the middle, a grey OnScreenController gets visible.
Click’n drag into it and you can move the grid.
Click’n drag the corner handles, let’s you rotate and resize the grid (more/less lines).
Click’n drag the middle handles lets you adjust the aspect ratio of the rectangle.
In the Inspector three colours to choose, plus the angle for precise rotation …
When you’re done arranging your clips, just delete the generator.
Hope, self-explanatory no need for a video-tutorial