P5js instance mode example

instance-mode-example.js

var sketch = function(p){

  p.setup = function(){
    p.createCanvas(p.windowWidth*0.8, 100);
  }

  p.draw = function(){
    p.background(0);
  }

  p.windowResized = function(){
    p.resizeCanvas(p.windowWidth*0.8, 100);
  }

}

var myp5 = new p5(sketch, 'script-1');