SEAFXCON.BAS - Sea FX Conversion.

This is a QBasic program which allows you to set the colour of the
water/gloop/fire in a custom Worms screen.

You supply the name of the PCX file to read, another name for the output
PCX, and the red/green/blue components of the lightest and darkest
of the sea's colours.

The program works out the appropriately gradiated colours for the sea and
puts them in the correct slots in the PCX file. The rest of the image is
unchanged.

PHiL