function preload(){

data = loadJSON('https://dog.ceo/api/breeds/image/random');

}

​

function setup() {

noCanvas();

  noLoop();

  let breedObj = data.message;

  for (let breed in breedObj){

   let url = ('https://dog.ceo/api/'+breed+'/image/random')

  loadJSON (url, function(response) {

   let img = createImg(response.message); 

  })

  }

}