interface Movable {
    fun tick()
    fun getLoc(): Point
}

fun main() {
    val m = object: Movable {
        var x = 0.0
        var y = 0.0
        override fun tick() {
            x += 24; y += 15
            if (x > 100) x -= 100
            if (y > 100) y -= 100
            if (x < 0)   x += 100
            if (y < 0)   y += 100
        }
        override fun getLoc(): Point = Point(x, y)
    }
    for (i in 1..10) {
        m.tick()
        m.getLoc().show()
    }
}