solidpen 192 255 192  0
solidbrush 230 255 230 
roundrect -10 5 50 100 5 5 
solidpen 0 0 0 0
label 20 90 θ
ellipse 26 11 44 29
ellipse 26 31 44 49
ellipse 26 51 44 69
moveto 60 20
lineto 20 20
lineto 20 60
lineto 60 60
moveto 20 40
lineto 60 40
// dc
moveto -20 20
lineto 5 20
lineto 5 80
lineto -20 80
ellipse -4 31 14 49
moveto -4 40
lineto 14 40
label 20 -1  VSI


//ellipse 20 10 40 30