the top of the screen. The menus group the programs together according to
their function, so let us first examine the Graphics programs.
Graphics programs
CASTLE illustrates the computer's ability to produce high-speed, multi-colour
graphics. It uses a variety of shapes (squares, rectangles, circles and triangles)
filled with either plain colours or patterns.
CLOWN is a similar illustration which incorporates other shapes.
CLOUD is a simple animated sequence in which various parts of a graphic
image are moved about the screen. The smoothness of movement is achieved by
switching between the normal and the shadow screens. Changes of colour are
used to produce a pleasing effect.
PATTERNS produces a sequence of complex figures, facinating to watch in
themselves, but which are then used to illustrate the speed with which the
computer can flood-fill an area with either a plain colour or a more complex
pattern.
SHAPES is a sequence of examples showing the basic shapes which can be
produced directly using built-in graphics commands. For the purposes of the
demonstration, each shape is drawn as a solid figure, each superimposed upon
the previous one, but it is also possible to produce outline shapes using solid or
broken lines.
B 8