Imaginative use of galvanised watering cans to create a water feature down a set of steps. Placing a submersible pump in the lower bucket and then passing the water to the top via a flexible hose is pretty much all that's needed to create this fun effect.
What a charming way to fill a blank wall in the garden! Could rely on the gutter for occasional water sound, or pipe it for continuous water flow....I'd paint each one a different color. No not rainbow colors, though that might be interesting.