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CIRCLE Statement Programming Example
 
The following program first draws a circle with the upper left quarter
missing. It then uses relative coordinates to position a second circle
within the missing quarter circle. Finally, it uses a different aspect
ratio to draw a small ellipse inside the small circle.
 
CONST PI=3.141593
SCREEN 2
' Draw a circle with the upper-left quarter missing.
' Use negative numbers so radii are drawn.
CIRCLE (320,100), 200,, -PI, -PI/2
' Use relative coordinates to draw a circle within the missing
' quarter.
CIRCLE STEP (-100,-42),100
' Draw a small ellipse inside the circle.
CIRCLE STEP(0,0), 100,,,, 5/25
' Display the drawing until a key is pressed.
LOCATE 25,1 : PRINT "Press any key to end.";
DO
LOOP WHILE INKEY$=""