Commands for the turtle's pen

Click the tab for the pen to see the following tools:

	pu = pen up – Picks up the pen so that the turtle does not draw.
	pd = pen down – Puts the pen down so that the turtle can draw.
	set pensize – Sets the width of the pen. The larger the number the fatter the line.
	set color – Sets the color of the line that the turtle draws. The value can be 0 to 99. See the table for colors.
	set shade – Sets the brightness of the color. 0 makes it blacker. 99 makes it whiter.
	fill screen – Fills the entire screen with the color and shade shown.