solidbrush 255 255 255
polygon -10 10  30 40  -10 70 -10 10
textcenter -5 20 -
textcenter -5 60 +
*label 20 40 μA
textcenter 5 40 Comp

solidpen 255 0 0 0
moveto 20 20 
lineto 20 -20
solidpen 0 0 255  0
moveto 20 60
lineto 20 100