Corner Pins and Reference Grids

New Movie In TOP (still image at 1920x480, added to repository) connects
to a Switch TOP.  I
branched off after with some Corner Pin TOPs that locate the bottom
middle of the image.  I then animated a color block with the Over TOP.
Also created two grids, copied circles to represent DeRez and a larger
grid to represent possible projection screen.  They are merged together.
The screen is x3 the size of DeRez.