第三周

PImage img0 , img1 , img2;
void setup(){
  size(500,500);
  img0 = loadImage("p1.png");
  img1 = loadImage("p2.png");
  img2 = loadImage("p3.png");
}
int userX=250, userY=250;
void draw(){
  background(128);
  if(keyPressed && keyCode==LEFT){
  image(img0 , userX , userY, 300,300);
  userX--;}
  else if(keyPressed && keyCode==RIGHT){
  image(img1 , userX , userY, 300,300);
  userX++;}
  else image(img2, userX , userY, 300,300);
}