//canvas.js
var p5 = require('p5')

module.exports = new p5(function () {
  this.setup = function setup () {
    this.createCanvas(700, 400)
    this.background(205)
    this.loadImage('/uploads/uploaded_image', function (img) {
      image(img, 0, 0)
    })
    this.updatePixels()
  }
  this.clearCanvas = function redraw () {
    this.background('black')
  }

button(type='button', id='clear').
            Click to clear

var canvas = require('./canvas.js')

document.getElementById('clear').onclick = function () {
  canvas.clearCanvas()
}