let sliderN, sliderD;

    function setup(){

        createCanvas(800, 600);

        sliderN = createSlider(1, 10, 4, 1);

        sliderD = createSlider(1, 10, 4, 1);

        sliderN.position(0, 10);

        sliderD.position(0, 50);

    }

    function draw(){

        background(255);

        beginShape();

        for(let a = 0; a < TWO_PI * sliderD.value(); a+=0.01) vertex(width / 2 + (cos((sliderN.value() / sliderD.value()) * a) * scl) * cos(a), height / 2 + (cos((sliderN.value() / sliderD.value()) * a) * scl) * sin(a));

        endShape(CLOSE);

    }