Thank you, Cagey. A good workout and it took me back to when the kids were wee - a very long time ago! There seemed to be two options for the final stage; I chose the straight line.
Note by Admin - post amended at the request of. Jack Aubrey
I chose the (diagonal) line too as it was thematic but there were two others that had a similar meaning. Really enjoyed it but had no idea about the theme.