LOGO basic techniques

Basic moves and turns:
Forwards fd 40
Backwards bk 30
Turn right rt 90
Turn left lt 90 (letter l and letter t, not 1t)

reset = clears the screen and starts you in the middle (good for the start of the program)

setpensize 5 = change the pen width (all one word with no gaps)

colour “blue = change the pen colour (must use speech marks at the beginning of the colour)  A full list of colours can be found here

To fill an area = fills the area that the arrow is in.  If you want to fill inside a shape, you will have to move inside it then use fill.

  • colour “red
  • fill 

** You could set up a little fillit procedure that moves inside the shape, fills and moves back again…

  • TO fillit
  • pu
  • rt 45
  • fd 2
  • fill
  • bk 2
  • lt 45
  • pd
  • END

Notice this procedure moves up and right a little bit so you need to make sure you are in the right place when you call the Fill procedure.

setxy 100 -200 = moves the arrow to a place on the screen.  If you don’t want it to draw a line there, use pu first!  0   0   is the middle of the screen – the first number is left and right; the second number is up and down.  You can experiment to find out the rest!