x.js

self.think(function () {
    var trolls = [
        "substack is silly"
        , "I AM A ROCK"
        , "CAPSLOCKSCRIPT IS THE BEST"
    ]

    var msg = trolls[Math.floor(Math.random() * 3)]

    self.say(msg)
})

self.think(function () {
    var x = (Math.random() * 20) - 10
    var y = (Math.random() * 20) - 10

    self.move(x, y)
}) 

self.hear(function (message) {
    self.say("ECHO " + message)
})

// substacks id 
// wizard:810e6dfd-1491-4b3a-92b3-e14b086e1767
// myself id
// wizard:0981