lr

Help Contents Graphics Relative Turtle Motion lr
leftRoll rightRoll

leftRoll degrees
lr degrees

Rolls the turtle (on to his left side) around the forward vector by the specified angle, measured in degrees (1/360 of a circle). This command is designed to run in perspective mode.

Example: 

perspective
lr 45
repeat 3 [fd 100 lt 120]

Example:

References:

leftRoll rightRoll