Below is a list of many of the most common commands that you can use with MSW Logo. Many of these commands are explained in the animated demonstrations.

Movement Commands:

Forward 100 (fd 100) 100 = 100 turtle steps

Back 50 (bk 50)

Right 90 (rt 90) 90 = 90 degrees

Left 45 (lt 45)

Screen and Housekeeping Commands:

Clearscreen (cs) clears the screen and returns the turtle to the centre

Clean clears the screen but leaves the turtle where it is.

Home returns the turtle to the centre of the screen but leavesthe drawing as is.

Hideturtle (ht) hides the Turtle but still draws lines.

Show turtle (st) shows the Turtle if it is invisible.

Pen Commands:

Penup (pu) lifts the pen off the screen

Pendown (pd) lowers the pen back on to the screen

Penerase changes the pen to an eraser

Penreverse causes the pen to erase existing lines otherwise draw - be very careful with this one.

Penpaint resets the pen back to drawing mode

Setpensize [n n] n is the size of the pen in pixels.

Setscreencolor [n n n] sets the background colour of the screen.Where the colors are written in sets of 3 numbers.

Setpencolor [n n n] sets the colour of the pen.

Setflood color [n n n] sets the color that a shape will be filled

Fill fills a shape with the current fill color

Repeat Command:

Repeat 4[FD 50 RT 90] repeats a set of instructions

Defining Procedures:

To name begins the process of defining a procedure called name

End finishes the process of defining a procedure