> tubeplot({[0,t,10,t=10..14],[0,10,t,t=5..10], [0,t,5,t=10..14], [0,14,t,t=0..5],[0,t,0,t=10..14], [0,20,t,t=0..10], [0,25,t,t=0..10], [0,t,10,t=20..25], [0,t,5,t=20..25],[0,t,10,t=20..25], [0,31,t,t=0..10], [0,40,t,t=0..10],[0,t,10,t=31..40],[0,35.5,t,t=6..10]}, numpoints=5, radius=1, axes=normal, scaling=constrained, orientation=[44, 68]);