Quadrille.textZoom = 0.5;
let quadrille;
let zoomSlider;

function setup() {
  createCanvas(6 * Quadrille.cellLength, 4 * Quadrille.cellLength);
  quadrille = createQuadrille(5, 'hola mundo');
  zoomSlider = createSlider(0.1, 0.9, 0.5, 0.01);
  zoomSlider.position(10, 210);
  zoomSlider.input(() => Quadrille.textZoom = zoomSlider.value());
}

function draw() {
  background('orange');
  drawQuadrille(quadrille);
}