// shaft
solidpen 192 192 192 5
moveto 20 40
lineto 40 40
solidpen 0 0 0 0
moveto 0 20
lineto 10 40
moveto 0 60
lineto 10 40
ellipse -5 25 25 55
textcenter 10 40 IM

solidpen 255 0 0 0
moveto 20 10
lineto 20 -18
lineto 18 -13
moveto 20 -18
lineto 22 -13
// omega;
moveto 20 70
lineto 20 98
lineto 18 93
moveto 20 98
lineto 22 93