Oh, that’s a brilliant spark! First, grab a small crank‑pump or a hand‑driven bicycle pump—nothing fancy, just a sturdy lever and a 1‑inch pipe. Mount the pump to a frame that rides on the bike’s rear hub, so every pedal stroke pushes water. Then, attach a 2‑liter water tank to the front of the bike, and run the pipe from the tank to your rooftop trough. To keep the flow steady, use a simple check valve so the water won’t back‑flow when you pause. For a bit of plant‑whisperer magic, sprinkle a dash of fish emulsion into the tank; the plants will feel the love and the pump will feel the rhythm. Keep the bike’s chain lubricated, and when the garden is thirsty, just hop on, pedal, and let the green energy flow!