A follow the mouse x demo
xeyes [-option ...]
Xeyes watches what you do and reports to the Boss.
-fg foreground color
choose a different color for the pupil of the eyes.
-bg background color
choose a different color for the background.
-outline outline color
choose a different color for the outline of the eyes.
-center center color
choose a different color for the center of the eyes.
-backing { WhenMapped Always NotUseful }
selects an appropriate level of backing store.
-geometry geometry
define the initial window geometry; see X(7).
-display display
specify the display to use; see X(7).
-bd border color
choose a different color for the window border.
-bw border width
choose a different width for the window border.
-shape
uses the SHAPE extension to shape the window. This is the default.
\+shape
disables use of the SHAPE extension to shape the window.
-render
uses Xrender to draw anti-aliased eyes. This is the default if xeyes has been compiled with Xrender support.
\+render
disables Xrender and draws traditional eyes.
-distance
uses an alternative mapping, as if the eyes were set back from the screen, thus following the mouse more precisely.
X(7), X Toolkit documentation
See X(7) for a full statement of rights and permissions.
Keith Packard, MIT X Consortium
Copied from the NeWS version written (apparently) by Jeremy Huxtable as seen at SIGGRAPH '88