Activities/Turtle Art/Turtle

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HowTo [ID# 28752]

The Turtle Palette (green)

examples (1)

descriptions (1)

	Clean	clear the screen and reset the turtle to center, pointed up (pen down, bright red)
	Forward (number)	move turtle forward
	Back (number)	move turtle backward
	Left (angle in degrees)	turn turtle counterclockwise
	Right (angle in degrees)	turn turtle clockwise
	Arc (angle in degrees,radius)	move turtle along an arc
	Setyx (xcor, ycor)	move turtle to position (xcor, ycor) [(0, 0) is in the center of the screen.]
	Seth (heading)	set the heading of the turtle [0 is towards the top of the screen.]
	Show (media)	draw text, images, or play sounds
	Scale (media)	Set the scale of images
File:TA-cpntainer.svg	Container	Load a media object from the Journal (plugs into the Show block)
	Text (size)	draw text next to the turtle
	Image	draw image (click on the Journal icon to search for an image from the Journal
	X coordinate	holds current x-coordinate value of the turtle (can be used in place of a number block)
	Y coordinate	holds current y-coordinate value of the turtle (can be used in place of a number block)
	Heading	holds current heading value of the turtle (can be used in place of a number block)

Turtle state values (can plug into a parameter):

• X, Y – Zeros for each are at center screen. Negative values are left and down; positive values are right and up.
• Heading – Zero is pointed up. Heading is in degrees clockwise.
• Angles are degrees from 0 to 360 (for larger values and smaller values all multiples of 360 are subtracted or added to get the value into the range 0..360).

Examples: 90 means a right angle (90 degrees), clockwise; –30 means a 30-degree angle, counterclockwise