我好想睡覺 week13

程式碼如下：
PImage imgBird;
void setup(){
  size(500,400);
  imgBird= loadImage("bird.png");
  imageMode(CENTER);
}
float birdX=100, birdY=300, oldX, oldY;
void draw(){
  background(255);
  image(imgBird, birdX,birdY,100,100);
  if(mousePressed) line(birdX,birdY, oldX,oldY);
}

void mousePressed(){
  oldX=birdX; oldY=birdY;
}

void mouseDragged(){
  birdX=mouseX; birdY=mouseY;
}