**''$BGCOLOR''** ''[[color|]]''\\ **''$BACKGROUND''**\\ \\ **''BGCOLOR =''** ''[[color|]];''\\ **''BGC = ;''**\\ **''BACKGROUND_COLOR = ;''** The background colour. Default: The colour defined in the Stock List file. It can be useful to use a different background colour in the Stock List window than for the screen mode, for example, to determine which pictures are transparent and which are not.  When the program is running as a screensaver however, it is more common to use the colour of many of the opaque pictures: black. It is not possible to use the coordinate format '''' with the ''[[color|]]'' parameter. If a segmentation command or a movement defines a background picture which is not covering the whole background area, then the background picture is placed before a homogenous surface having the background color.