.PS 5
     d = 0.5
     [ box ht d wid 3.5 weight d/20
       box ht d wid d/2 filled 0.5 noedge
       spline weight 0.2 edge .75 right d then up d then right d then up d
     ] 
linecolor = red; lineweight = 0.375
circle rad 3 at last block - 0,d/2
line from last circle .4th to last circle .8th
.PE
