Here is an update on my progress!
So my initial idea was like a funnel spiral kinf of contraption. The seeds would be dropped from the height producing a first sound which is the rain dropping. After which, the second sound would be produced when the seeds are sliding producing the constant rain sound. Here is the actual try out of the sound texturizer.
So part of my sound texturizer managed to be made like how i imagine to be however unfortunately the bottom part which i imagined it to be a continuous spiral where the seeds flow didn’t exactly work out how it should be! So i improvised and made it straight instead. However another point to take note was that instead of using the flimsy metal, the harder metal, produced a not so rain-ish sound like i expected it to be. So I might have to go back to that and work around it. Still sticking to the concept of using the same material but changing the distance and direction to change the sound produced. Will work on a better idea for the final!