Your students, no doubt, have long since realized that Logo is not the first-string choice for effecting graphic realism. But, now and again, identifiable pictures are needed for Logo programs. Somehow, stick figures can bely the sophistication of the code by which they appear, not to mention that a turtled drawing of even moderate detail can take eons to manifest in full geometric splendor. This article discusses "Logo LinX".
Harris, J. (1988). Secular conversions. Logo Exchange, 7(1), 15-17.