mar21

float
// paddle
  paddleX,
  paddleY,
  paddleW, // plotis
  paddleH, // aukštis
  paddleStep,
// ball
  ballX = 0,
  ballY = 0,
  ballSize,
  ballStep;

void setup () {
  size (1280, 700);
  rectMode (CENTER);

  paddleX = width * 0.5; // per vidurį
  paddleY = height * 0.95; // apačioje

  paddleW = width * 0.125;
  paddleH = height * 0.03;

  ballSize = height * 0.1;
  paddleStep = ballStep = width * 0.01;
}

void paddle () {
  fill (255, 0, 0);
  rect (paddleX, paddleY, paddleW, paddleH);

  if (keyPressed) {
    //if (key == 'a')
    if (keyCode == LEFT && paddleX > 0)
      paddleX -= paddleStep;
    if (keyCode == RIGHT && paddleX < width)
      paddleX += paddleStep;
  }
}

void ball () {
  fill (255);
  circle (ballX, ballY, ballSize);

  ballX += ballStep;
  ballY += ballStep;

  if (ballY > height)
    stop ();
}

void draw () {
  background (0);
  paddle ();
  ball ();
}