ions.turtlesColor,
                    cmd: val => {
                        view.drawOptions.turtlesColor = val
                        if (!anim.isRunning()) view.draw()
                    },
                },
                moves: {
                    monitor: [model, 'moves'],
                    // cmd: () => model.moves
                },
                atEdge: {
                    chooser: [model.turtles.getDefault('atEdge'),
                    ['wrap', 'die', 'clamp', 'bounce', 'random']],
  