Decorative Lights

People seem to be increasingly ambitious with their external Christmas light decorations. Outlining the shape of the building and windows with lights can be very effective - but how the heck to they get the lights on to the ridge of the roof?

I'm surprised Extinction Rebellion haven't started a campaign against the excessive use of electricity!

(A pity about the bins and paving bricks left in front of the houses, obstructing the view.)