solidpen 255 0 0 0
polyline 20 40 20 -20
solidpen 0 0 255  0
polyline 20 40 20 100
solidbrush 255 255 255
solidpen 0 0 0 0
offset 10 0
polygon -10 10  30 40  -10 70 -10 10
textcenter -5 20 -
textcenter -5 60 +
*label 20 40 μA
textcenter 5 40 OA