PARAMETERS

1. Speed
   

   auto-rotation rate: 0 = none, 1 = max
   

2. Decay
   

   sweep width: 0 = min, .5 = fit to frame, 1 = max
   

3. Radius
   

   sweep radius: 0 = min, 1 = max
   

4. Color
   

   selects sweep color: white, R, G, B, C, M, Y

5. Origin X
   

   sweep origin X: 0 = left, 1 = right
   

6. Origin Y
   

   sweep origin Y: 0 = top, 1 = bottom
   

7. Angle
   

   angle: 0 = 0 degrees, 1 = 360 degrees
   

8. Scale
   

   radius scaling: 0 = none, 1 = max
   

9. Reverse
   

   if non-zero, reverse sweep direction
   

Assembler optimized. Supports 32-bit color only.
The Angle parameter is more useful with auto-rotate off (Speed = 0).
The Scale parameter is useful for ensuring that the sweep fills the
entire frame, e.g. if the frame has an unusual aspect ratio, or the
origin is moved to a corner of the frame. The fit to frame behavior
(Radius = .5) assumes Scale = 0.