.PS
Start: circle "start" dotted
arrow
X: [ box "X" ]
arrow
End: circle "end" dotted
spline -> from X.e right .4 then up .5  then left 2 to X.nw
spline -> from Start.e right .1 then down .2 then down .2 right .4 then right .9 to End chop
.PE
