Across the Glowing Bridge

Across the Glowing Bridge
Your Homework

St Paul's marble white against a Prussian blue sky which morphs into cadmium yellow and red earth before being lost into depths of darkness. The glow of the city bounces around the scene, reflecting on the water and through gaps in the trees.
The blue path glows like neon lights and outlined figures are frozen in time as they make their way to the North bank. How many are there? The nearest group comprises 3 individuals but it's easy to imagine more or less.
The handrail has become a fiery waterfall, dripping through to the Thames below. As you follow the handrail towards St Paul's, the rail darkens and solidifies.
In the sky to the left, a tantalising feature pokes its head up from behind the darkness. What is it? Part of St Paul's? Perhaps...
On the right, windows become abstract paintings. Indistinct, yet unique.
It's late and there are a few people around. Where are they headed?