Thank you so much, I 've managed to successfully create 2 new paddles, thanks to you.
My problem: They can't move and the ball goes right through them =(

any suggestions?

this is what I have:


// Global variables for the ball
float paddle_left;
float paddle_left1;
float distWALL = 620;
float ball_x;
float ball_y;
float ball_dir = 1;
float ball_size = 10; // Radius
float dy = 0; // Direction
float lastry;
float paddle_right =10;
float paddle_right1 =10;

//variables for the paddle
int paddle_width = 8;
int paddle_height = 50;

int dist_wall = 15;

void setup()
{
  size(640, 360);
  rectMode(RADIUS);
  ellipseMode(RADIUS);
  noStroke();
  smooth();
  ball_y = height/2;
  ball_x = 1;
}

void draw()
{
  background(51);

  ball_x += ball_dir * 1.0;
  ball_y += dy;
  if (ball_x > width+ball_size) {
    ball_x = -width/2 - ball_size;
    ball_y = random(0, height);
    dy = 0;
  }

  // Testing to see if the ball is touching right paddle
  float py = width-dist_wall-paddle_width-ball_size;
  if (ball_x == py
    && ball_y > paddle_right - paddle_height - ball_size
    && ball_y < paddle_right + paddle_height + ball_size) {
    ball_dir *= -1;
    if (paddle_right != paddle_right-5) {
      dy = (paddle_right-paddle_right-5)/2.0;
      if (dy > 5) {
        dy = 5;
      }
      if (dy < -5) {
        dy = -5;
      }
    }
  }

  // If ball hits paddle or back wall, reverse direction
  if (ball_x < ball_size && ball_dir == -1) {
    ball_dir *= -1;
  }

  // If ball touches top or bottom edge, reverse direction
  if (ball_y > height-ball_size) {
    dy = dy * -1;
  }
  if (ball_y < ball_size) {
    dy = dy * -1;
  }
 
  // Testing to see if the ball is touching left paddle
float PY = width-distWALL+paddle_width+ball_size;
if (ball_x == PY
&& ball_y > paddle_left - paddle_height - ball_size
&& ball_y < paddle_left + paddle_height + ball_size) {
ball_dir *= -1;
if (paddle_left != paddle_left-5) {
dy = (paddle_left-paddle_left-5)/2.0;
if (dy > 5) {
dy = 5;
}
if (dy < -5) {
dy = -5;
}
}
}

  // Draw ball
  fill(255);
  ellipse(ball_x, ball_y, ball_size, ball_size);

  // Draw the paddle
  fill(153);
  rect(width-dist_wall, paddle_right, paddle_width, paddle_height);
  rect(width-distWALL, paddle_left, paddle_width, paddle_height);
  rect(width-dist_wall, paddle_right1, paddle_width, paddle_height);
  rect(width-distWALL, paddle_left1, paddle_width, paddle_height);
}
// Keypressing options
void keyPressed() {
  if (keyCode == UP) {
    lastry = paddle_right;
    paddle_right=paddle_right-5;
    background(0);
  }
  if (keyCode == DOWN) {
    lastry = paddle_right;
    paddle_right=paddle_right+5;
    background(0);
  }
  if (key == 'a') {
    lastry = paddle_left;
    paddle_left=paddle_left-5;
    background(0);
  }
  if (key == 'z') {
    lastry = paddle_left;
    paddle_left=paddle_left+5;
    background(0);
   
      if (keyCode == 't') {
    lastry = paddle_right1;
    paddle_right1=paddle_right1-5;
    background(0);
  }
  if (keyCode == 'v') {
    lastry = paddle_right1;
    paddle_right1=paddle_right1+5;
    background(0);
  }
  if (key == 'w') {
    lastry = paddle_left1;
    paddle_left1=paddle_left1-5;
    background(0);
  }
  if (key == 'q') {
    lastry = paddle_left1;
    paddle_left1=paddle_left1+5;
    background(0);
  }
  }
  if (paddle_right <= 0) //stop paddle from leaving top of screen
  {
    paddle_right = paddle_right+5;
  }
  if (paddle_right >= height-10) //stop paddle from leaving bottom of screen
  {
    paddle_right=height-15;
  }
}

Thank You SO much for baring with me!! It works =) thankyouthankyouthankyou!!