/** * Sprite (Teddy) * by James Patterson.  *  * Demonstrates loading and displaying a transparent GIF image.  */ PImage teddy;float xpos;float ypos;float drag = 30.0;void setup() {  size(200,200);  teddy = loadImage("teddy.gif");  xpos = width/2;  ypos = height/2;  frameRate(60);}void draw() {   background(102);    float difx = mouseX - xpos-teddy.width/2;  if(abs(difx) > 1.0) {    xpos = xpos + difx/drag;    xpos = constrain(xpos, 0, width-teddy.width);  }      float dify = mouseY - ypos-teddy.height/2;  if(abs(dify) > 1.0) {    ypos = ypos + dify/drag;    ypos = constrain(ypos, 0, height-teddy.height);  }      // Display the sprite at the position xpos, ypos  image(teddy, xpos, ypos);}