Class ANSI
Class ANSI implements simple operations in the text mode.

unit GotoXY:procedure(x,y:integer)
Moves the text cursor to the position (x,y)
unit SetColor:procedure(color:integer)
Sets the foreground color for text writing.
unit SetBackground:procedure(color:integer)
Sets the background color for text writing.
unit Bold:procedure
Sets the font to bold font.
unit Normal:procedure
Sets the font to normal font.
unit Clear:procedure
Clears terminal.