jm2

PImage img;
int div=40, i=0, stepx, stepy;
float theta;

void setup() {
  img = loadImage("john.jpg");
  size(img.width, img.height);
  stepx = (int) width/div;
  frameRate(10);
}
void draw() {
  for (int x=0; x<width; x += stepx) {
    float offSet = PI/div*i;
    int h =(int) map(sin(theta+offSet), -1, 1, 0, height);
    int y =(int) map(sin(theta+offSet), -1, 1, 0, height);
    copy(img, x, height-y, stepx, y, x, 0, stepx, y);
    copy(img, x, 0, stepx, height-y, x, y, stepx, height-y);
    i++;
  }
  theta += (TWO_PI/30);

  //if (theta<TWO_PI) saveFrame("image-###.gif");
}