Logo has a number of other drawing commands, some of which are given below.
pu − penup
pd − pendown
ht − hideturtle
dt − showturtle
The pendown and penup commands tell the turtle to leave ink on the screen as it moves or not to leave ink, respectively. The hideturtle and showturtle commands hide or show the turtle, but do not affect its ability to leave ink as it moves. The home command causes the turtle to return to the center of the screen. It may leave ink behind, when the turtle returns to the center of the screen. The setpensize command decides the drawing pen size.
penup or pu means pick pen up, so you can move turtle without leaving tracks.
Following are few practice commands with the desired results on the right.