Turtle-tastic Moves

Forwards and Backwards

The number you put in the brackets will be the amount of pixels your turtle moves.

forward(100)
backward(100)

This moves your turtle forward and backward by 100 pixels.

Left and Right

You can add in equations inside the brackets, and the program will calculate it for you!

left(360/6)
right(90)

This turns your turtle left 60 degrees and right 90 degrees.

How do degrees work?

The syntax for the left angle in the above code would make a six sided object. This makes the angle at 60 degrees. So this means:

• 360 degrees is a full circle - the same direction.
• 180 degrees is a half circle - the oppposite direction.
• 90 degrees is a quarter circle - a perfect right angled turn.

Move to a Set Location

Positioning in most languages get you to write the X and Y location inside the brackets, like goto(x, y).

Remember

X is across and Y to the sky. And (0,0) is the very center of the screen.

Try these two functions. Can you see the difference between goto and penup?

goto(180, -82)
# or
penup(180, -82)

Explanation: Penup() moves the turtle without drawing a line from it’s original position to the desired position. The above code is positive on the x axis (180) which is to the right on screen, negative on the Y axis (-82) which is down on the screen.

I Can Understand How To…

• Move the turtle forwards and backwards.
• Turn the turtle.
• Use (X, Y) coordinates to move the turtle.