Processing, button, void

that’s easy

save the image in the folder where the sketch is

look at loadImage() in the reference and then at the image() command

https://www.processing.org/reference/loadImage_.html

Example


PImage img;

void setup() {
  img = loadImage("laDefense.jpg");
}

void draw() {
  image(img, b.xPos, b.yPos);  // your bird !!!!!!!!!!!!!!!!!!!!!
}