solidpen 0 0 0 0
solidbrush 128 128 255 
rectangle 0 0 80 100
moveto 80 0
lineto 0 100
Label 20 20 DC
Label 50 70 AC3∅
Label 50 90 PWM
*
solidpen 255 0 0 2
moveto 20 50
lineto 60 50
lineto 50 46
moveto 60 50
lineto 50 54