Simple Corner Frame
This Scrippy makes it easy to have a never ending corner effect by simply offsetting an inside container down from the top and over from the left. The border around the inside container is created using 2 positioned containers instead of inserting a frame, that way you can just have the solid white line at the top and left hand side of the inner container.
To create this one, I first inserted the red checkered background. Then I inserted 2 different frames around the outside edge, with the red being 8 pixels wide and the white 6 pixels wide.
Then I inserted a positioned container and set the horizontal and vertical positions as shown below. I moved the container in from the left 115 pixels and down from the top 115 pixels. Since I only wanted the inside container to go to the edge of the outside frames, I set the right and bottom edges at 14 pixels (red frame = 8 and white frame = 6 so 8+6=14). If you wanted it to go all the way to the edge of Scrippy, just set the right and bottom to 0 pixels.

Next I inserted a positioned container and set the vertical size at 4 pixels wide to hold the background color for the solid line located at the top of the inner container.
Then I entered another positioned container and set the horizontal size at 4 pixels wide to hold the background color for the solid line located on the left of the inner container.
When you download the SSC file, click on the buttons for these containers (the 2nd and 3rd positioned containers) and you'll see that they are both set 115 pixels from the top and left, and 14 pixels from the right and bottom edges of Scrippy so they'll end at the inner edge of the outside framing. Again, if you wanted the solid lines to go to the outside edge of Scrippy, just enter 0 pixels for the right and bottom settings.
