┌────────────────────────────────────────────────────┐
│               Selective Scrolling.                 │
└────────────────────────────────────────────────────┘

This example demonstrates the SCROLL procedure which
allows you to clear all or part of a rectangular area
of the screen to the colour attribute of your choice.

The text within the specified rectangle is scrolled up
or down by however many rows you want and, if scrolled
outside of the rectangle, is replaced by blank lines
in the colour specified.

Press <Enter> to see it in action.