Quadrille.cellLength = 40;
let quadrille;
let replaced = false;

function setup() {  
  createCanvas(400, 400);
  reset();  
}  

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

function mouseClicked() {
  replaced = !replaced;
  replaced ? quadrille.replace('🐛') : reset();
}  

function keyPressed() {  
  replaced = !replaced;
  replaced ? quadrille.replace('🙈') : reset();
}  

function reset() {  
  quadrille = createQuadrille(10, 10, 25, color('red'));
  quadrille.rand(25, color('lime')).rand(25, color('blue'));  
}