My instances can scribble on the screen or some other Form, drawing and printing at any angle. Since I am a BitBlt, the drawing can be done with an arbitary source Form.

	geometric designs
	dragon: filberts:side: hilbert:side: hilberts: mandala: spiral:angle: web

	initialize-release
	defaultNib: roundNib: squareNib:

	operations
	arrowHead arrowHeadFrom:to: color: down fill:color: go: goto: home north place: print:withFont: turn: up

	private
	location:direction:penDown: sourceForm:

	instance creation
	new newOnForm:

	tablet drawing examples
	feltTip:cellSize: inkBrush simplePressurePen tabletScaleFactor testMouseTracking testTabletTracking

	accessing	top
	direction Answer the receiver's current direction. 0 is towards the top of the screen.
	location Answer where the receiver is currently located.

	geometric designs	top
	dragon: Display restoreAfter: [Display fillWhite. Pen new dragon: 10].
	filberts:side: Display restoreAfter: [Pen new filberts: 4 side: 5]
	hilbert:side: Draw an nth level Hilbert curve with side length s in the center of the screen. Write directly into the display's bitmap only. A Hilbert curve is a space-filling curve.
	hilberts: Display restoreAfter: [Display fillWhite. Pen new hilberts: 5]
	mandala: Display restoreAfter: [Pen new mandala: 30]
	spiral:angle: Draw a double squiral (see Papert, MindStorms), where each design is made by moving the receiver a distance of n after turning the amount + or -a.
	web Display restoreAfter: [Pen new web]

	initialize-release	top
	defaultNib: Nib is the tip of a pen. This sets up the pen, with a nib of width widthInteger. You can also set the shape of the pen nib using: roundNib: widthInteger, or squareNib: widthInteger, or sourceForm: aForm
	roundNib: Makes this pen draw with a round dot of the given diameter.
	squareNib: Makes this pen draw with a square nib of the given width.

	operations	top
	arrowHead Put an arrowhead on the previous pen stroke
	arrowHeadFrom:to: Put an arrowhead on the pen stroke from oldPt to newPt
	color: Set the pen to the given color or to a color chosen from a fixed set of colors.
	down Set the state of the receiver's pen to down (drawing).
	fill:color:
	go: Move the pen in its current direction a number of bits equal to the argument, distance. If the pen is down, a line will be drawn using the receiver's form source as the shape of the drawing brush.
	goto: Move the receiver to position aPoint. If the pen is down, a line will be drawn from the current position to the new one using the receiver's form source as the shape of the drawing brush. The receiver's set direction does not change.
	home Place the receiver at the center of its frame.
	north Set the receiver's direction to facing toward the top of the display screen.
	place: Set the receiver at position aPoint. No lines are drawn.
	print:withFont: Print the given string in the given font at the current heading
	turn: Change the direction that the receiver faces by an amount equal to the argument, degrees.
	up Set the state of the receiver's pen to up (no drawing).

	private	top
	location:direction:penDown:
	sourceForm: Set the receiver's source form to be the argument, aForm.

	examples	top
	example Draw a spiral with a pen that is 2 pixels wide.

	instance creation	top
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.
	newOnForm:

	tablet drawing examples	top
	feltTip:cellSize: Warning: This example potentially uses a large amount of memory--it creates a Form with cellSize squared bits for every Display pixel.
	inkBrush Similar to simplePressurePen, but this example uses the average of the recent pen pressure values. The effect is that of a Japanese ink brush that comes up gradually off the paper as the brush is lifted, causing end (and beginning) of each stroke to taper. Requires the optional tablet support primitives which may not be supported on all platforms. Works best in full screen mode. Shift-mouse to exit.
	simplePressurePen An example of using a pressure sensitive pen to control the thickness of the pen. This requires the optional tablet support primitives which may not be supported on all platforms. Works best in full screen mode. Shift-mouse to exit.
	tabletScaleFactor Answer a Point that scales tablet coordinates to Display coordinates, where the full extent of the tablet maps to the extent of the entire Display.
	testMouseTracking A very simple example of drawing using the mouse. Compare the tracking speed of this example with that of testTabletTracking. Mouse down to draw a stroke, shift-mouse to exit.
	testTabletTracking A very simple example of drawing using the pen of a digitizing tablet such as a Wacom ArtZ tablet. This requires the optional tablet support primitives which may not be supported on all platforms. Compare the tracking speed of this example with that of testMouseTracking. On a Macintosh, the tablet primitives provide roughly 120 samples/second versus only 60 mouse samples/second, and the difference is noticable. Works best in full screen mode. Mouse down to draw a stroke, shift-mouse to exit.