I'm quite new to the world of node red and I have a project where I don't really know where to start, and I need some advice, currently my project includes a reading part from an mqtt server, of several "buoys" of which it shows the location on a world map. I would like to be able to drag and drop these buoys and have as a result a coordinate to return to the mqtt server, to then be processed by another program
here is my actual flow, i know, it's messy, and it probably doesn't work if the server or the py program aren't up 
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