Index of commands
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| To
enter a command, simp1y type it in from the keyboard and press
enter. Some commands (like forward, right and repeat) require that
other information be entered- after the command.
There must be a space between the command-and the information, and,
between two pieces of information. |
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Wrong:
forward100 (no space) |
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Correct: forward 100 |
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Back (bk)
|
Make the turtle wa1k backward so many steps. |
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bk
200 will make
the turtle walk backward
200 steps |
clean
|
Clear
all of the lines from the window, but leave the turtle in the same
place |
clearscreen (cs)
|
Clear
all the lines from the window and move the turtle to the home
position |
forward (fw)
|
Make the turtle walk forward so many steps. |
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fw
200 will make the turtle
walk forward 200 steps |
hideturtle (ht)
|
Make
the turtle disappear. |
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Commands
1ike forward and backward will still draw lines. |
home
|
Move the turtle to the home position. Note:
if the pen is down, the turtle will draw a home to the home position
when this command is given |
left (lt)
|
Turn
the turtle to the left by so many degrees. |
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A
quarter turn is 90’, turn around is 180 degrees. left 45 will make
the turtle turn 45’ to the left |
pendown (pd)
|
Tell the turtle to start drawing. |
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When
the pen is down the turtle will leave a line behind wherever it
goes. The turtle will keep-drawing until it is given a penup
command. The pen is down when you start. |
penup (pu)
|
Tell the turtle to stop drawing. |
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When
the pen is up, the turtle can move without leaving a line behind.
The pen will stay up unti1 a pendown command is given. |
repeat
|
See
Repeat on next page |
right (rt)
|
Turn
the turtle to the right by so many degrees. right 45 will make the
turtle turn 45’ to the right |
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right
45 will make the turtle turn 45’ to the right |
setheading (seth)
|
Make the turtle turn to face a certain direction. 0’
is due ’east’, 90’ is due
’north’, etc. Setheading 135 will make the turtle turn so that
it is facing ’north west’ |
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0’
is due ’east’, 90’ is due ’north’, etc. Setheading 135
will make the turtle turn so that it is facing ’north west’ |
showturtle (st)
|
makes
the turtle re-appear, if it was hidden with hideturtle. |