Point_(-10)
rotbox(boxwid/2,,thick 2)
Point_(30)
rotbox(,,shaded "yellow" outlined "blue" thick 3,r=0.1) \
at last [].se+vec_(boxwid,0)
"r=0.1" at last []
move to last [].ne
Point_(0)
[[]; for_(2,16,2, `rotbox(,,dashed,t=m4x/10) with .nw at \
ifelse(m4x,10,`2nd [].sw+(0,-0.1)',`last [].ne+(boxwid*0.1,0)')
sprintf("t=%g",m4x/10) at last []') ] with .sw at last [].se+(0.1,0)
