Although I just recently discovered it, postcard poetry has been around for a while. Here is the second one I submitted to Rattle Magazine. I made it from scratch. Unfortunately it wasn't accepted for publication in the magazine.
14/02/2019
It's raining and I've a feeling
it'll rain until the day
I can finally make peace
with the sun casting my shadow
on these cold and empty walls.
But for now, like my tears
guide the rain, your heart
guides my hand.