PImage img1;

PImage img2;

void setup() {

  size(600, 300);

  img1 = loadImage("hoja-de-otoño.jpg");

  img2 = loadImage("OTOOño.jpg");

}

void draw() {

  background(63, 126, 62);

  float diameter = map(mouseX, 0, width, 10, 800);

  image(img1, 20, 20, diameter, diameter);

  image(img2, 300, 20, diameter, diameter);

}