del()
        model.setup()

        const view = new TwoDraw(model, {
            div: 'modelDiv',
            patchSize: 20,
            drawOptions: {
                turtlesColor: 'yellow',
                turtlesSize: 3,
                turtlesShape: 'bug',
                linksColor: 'red',
                linksWidth: 3,
                // patchesMap: 'Jet', // for bright patch colors!
            }
        })

        const anim = new Animator(
            () => {
                model.step()
       