We already learned the SPIN command. The effect is to rotate and redraw a picture symmetrically around a fixed point (defined by the turtle). The effect of the new command SPINR is similar but the turtle keeps moving and not just turning. For example, the command SPIN 4 [FD 50] make a plus sign while SPINR 4 [FD 50] will make a square to the right of the turtle. similarly, SPINL 4 [FD 50] will make a square to the left of the turtle.
Here are some further example that illustrate the SPINR and SPINL
commands:
SPINR 5 [FD 50]
SPINL 3 [FD 40]
SPINR 4 [CURVER 120 70]
SPINR 6 [CURVER 120 70 ]
Practice exercises
Additional
exercises
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