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.CIRCLE Statement QuickSCREENi

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CIRCLE - a graphics statement that draws an ellipse or circle
         with a specified center and radius
  CIRCLE [STEP] (x,y),radius[,[color][,[start][,[end][,aspect]]]]
    (x,y) are the screen coordinates of the center of the circle or ellipse
    radius, a numeric expression, is the radius
    Use STEP if x and y are offsets from the current cursor position,
      rather than absolute screen coordinates
    start and end can be used to draw arcs
    color and aspect are Details
See Also  SCREEN Statement - to find out about the different screen
                               coordinate systems that are available