safe://sharedmap
This is an attempt to use a publicly shared mutable, just for learning and demo purposes.
You can pick colors at the bottom of the screen, then click on the map to move the corresponding pawns at your will.
When you are happy with the positions, you can share them on the Safe network with the blue Safe icon button.
beware, each time you hit the blue Safe button it will eat some puts from your account.
Next step will be to make something usefull 
EDIT : cool someone moved the thingies