Syntax
HIDETURTLE
HT
Explanation
HIDETURTLE makes the current turtle(s) disappear from the screen. The turtle continues to draw, but cannot be seen. The turtle draws much faster when it is hidden.
Also see SHOWTURTLE and SHOWN?.
Example

This is a HIDETURTLE command example. Its executes "FD 30 HIDETURTLE" command.
? FD 30 \
? HIDETURTLE
?