Activities/Turtle Art/Turtle

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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
  Set scale (media) Set the scale of images
  Container Load a media object from the Journal (plugs into the Show block)
  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)
  Scale holds current scale value

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