rectangle 0 -10 40 10
label 20 0 SoC
*
moveto 10 30 
lineto 30 30
moveto 15 35 
lineto 25 35
moveto 10 40
lineto 30 40
moveto 15 45 
lineto 25 45
moveto 10 50 
lineto 30 50
moveto 15 55 
lineto 25 55
moveto 10 60
lineto 30 60
moveto 15 65 
lineto 25 65
*
*plus
solidpen 255 0 0 0
moveto 60 20 
lineto 20 20
lineto 20 30
*
*minus
solidpen 0 0 255 0 0
moveto 60 80 
lineto 20 80
lineto 20 65