​

function setup() {

  createCanvas(512, 512);

  //createButton('Rainbow').mousePressed(generateRainbow);

}

​

function generateRainbow(rainbowZ){

  const path = 'http://localhost:8000/query';

  const data = {

    z: rainbowZ,

    truncation: 0.8

  };

  httpPost(path,'json',data, gotRainbow, gotError);

}

​

function gotError(error){

  console.log(error);

}

​

function gotRainbow(data){

  rainbow = createImg(data.image,"");

  rainbow.hide();

}

​

function draw() {

  background(220);

  if (rainbow) {

    image(rainbow, 0, 0);

  }

}