in sketch.p5.js [59:76]
function setup() {
//console.log('setup');
var bgcolor = sketchConfig.bgcolor;
clear();
background(color(bgcolor.r, bgcolor.g, bgcolor.b));
d3.select('#rpd-jb-preview-target').selectAll('.sketch-canvas').remove();
canvas = createCanvas(sketchConfig.width, sketchConfig.height).parent('rpd-jb-preview-target');
canvas.canvas.className = 'sketch-canvas';
canvas.canvas.style.visibility = 'visible';
ctx = canvas.drawingContext;
noLoop();
updateSketchConfig(sketchConfig, true);
}