CPC PART OF 4096 COLOUR DEMO preview (c) Kevin Thacker 2001

This is the CPC part of the 4096 colour demo preview.
If a CPC+ is not detected this demo is run. The demo is
unfinished and needs checking with different CRTC types.
The final demo will show "sorry demo doesn't run on cpc"
moving in a sine wave pattern very smoothly with the coloured
rasters behind it.
