Pencil Code Reference > lt
lt pivots the turtle clockwise (lt stands for "left turn").
The turn is measured in degrees.
Notice that the turtle will not actually move in the new direction
until you tell it to move forward with
When using a pen, putting
lt between two
fd moves can draw an angle.
pen lime fd 100 lt 120 fd 100
Notice that the angle used by
lt is the exterior angle.
The interior angle added to the exterior angle will be 180.
For example, the 60 degree interior angle drawn by the program
above corresponds to the 120 degree exterior angle swept out by
lt turns left from the turtle's point of view, so if the turtle is facing downward, when it turns left from its point of view, it will end up facing right from your point of view. The demo below can be clicked a few times to show different starting directions.
turnto random 360 pen orange fd 100 lt 100 fd 100
lt can also be used to draw arcs by using a second argument.
Read the reference page on arcs.