spline right then up then left then down ->
move right 2cm
spline right then up left then down ->
move right 2cm
dot; dot; dot;

dot rad 150% color red at 1st vertex of 1st spline
dot same color orange at 2nd vertex of 1st spline
dot same color green at 3rd vertex of 1st spline
dot same color blue at 4th vertex of 1st spline

dot same color red at 1st vertex of 2nd spline
dot same color green at 2nd vertex of 2nd spline
dot same color blue at 3rd vertex of 2nd spline

print 2nd vertex of 1st spline.x, 2nd vertex of 1st spline.y
