line dotted right 1 then down 0.5 left 1 then right 1
spline from start of first line color red \
  right 1 then down 0.5 left 1 then right 1 <->
spline from start of first line color blue radius 0.2 \
  right 1 then down 0.5 left 1 then right 1 <->

move down 1 from start of first line
line radius 0.3 \
  right 1 then down 0.5 left 1 then right 1 <->
