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    "import pygame\n",
    "import random\n",
    "import math\n",
    "\n",
    "# init pygame\n",
    "pygame.init()\n",
    "\n",
    "# init the game's screen with certain size\n",
    "screen_width = 800\n",
    "screen_height = 600 \n",
    "paddle_length = 50\n",
    "paddle_deep = 10\n",
    "\n",
    "screen = pygame.display.set_mode([screen_width, screen_height])\n",
    "\n",
    "pygame.display.set_caption(\"Pong modified game\")\n",
    "\n",
    "def paddle(x, y, plen, pdeep):\n",
    "    pygame.draw.rect(screen, [255,205,0], [x,y,plen,pdeep])\n",
    "    # pygame.display.update()\n",
    "\n",
    "def screen_update():\n",
    "    pygame.display.update()\n",
    "   \n",
    "def game_message(msg, x, y, color):\n",
    "    font_style = pygame.font.SysFont(None, 50)\n",
    "    mesg = font_style.render(msg, True, color)\n",
    "    screen.blit(mesg, [x, y])\n",
    "    screen_update()\n",
    "\n",
    "def ball(x, y, radius):\n",
    "    pygame.draw.circle(screen, [0,120,120], [x, y], radius, 0)\n",
    "\n",
    "x1 = screen_width/2\n",
    "y1 = screen_height-10\n",
    "paddle(x1, y1, paddle_length, paddle_deep)\n",
    "screen_update()\n",
    "\n",
    "step = 15\n",
    "edge = 10"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "id": "c2241ce6-607e-41e3-a5bd-231d0c519846",
   "metadata": {},
   "outputs": [],
   "source": [
    "# clock\n",
    "clock = pygame.time.Clock()\n",
    "\n",
    "xdiff = 0\n",
    "ydiff = 0\n",
    "\n",
    "ballradius = 8\n",
    "ballstep = 10\n",
    "ballx = random.randint(0, screen_width)\n",
    "bally = random.randint(0, screen_height)\n",
    "ball(ballx, bally, ballradius)\n",
    "screen_update()\n",
    "bx = random.randint(-ballstep, ballstep)\n",
    "by = random.randint(-ballstep, ballstep)\n",
    "\n",
    "# Game loop: receive user events and process them\n",
    "playing = True\n",
    "gamespeed = 20\n",
    "while playing:\n",
    "    pygame.display.set_caption(str(bx)+':'+str(by))\n",
    "    for event in pygame.event.get():\n",
    "        if event.type == pygame.QUIT:\n",
    "            playing = False\n",
    "        if event.type == pygame.KEYDOWN: # if key pressed\n",
    "            if event.key == pygame.K_ESCAPE:\n",
    "                playing = False\n",
    "            if event.key == pygame.K_LEFT:\n",
    "                pygame.display.set_caption(\"Left\")\n",
    "                xdiff = -edge\n",
    "                ydiff = 0\n",
    "            if event.key == pygame.K_RIGHT:\n",
    "                pygame.display.set_caption(\"Right\")\n",
    "                xdiff = edge\n",
    "                ydiff = 0\n",
    "            if event.key == pygame.K_SPACE:\n",
    "                xdiff = 0\n",
    "                ydiff = 0\n",
    "    # if paddle is not out of screen then move it\n",
    "    if 0 <= x1+xdiff and x1+xdiff <= screen_width-paddle_length:\n",
    "        x1 += xdiff\n",
    "\n",
    "    # Make bouncing ball\n",
    "    # write your code here...\n",
    "\n",
    "    # clear screen\n",
    "    screen.fill([0,0,0]) # fill screen with black color\n",
    "    # draw the paddle\n",
    "    paddle(x1, y1, paddle_length, paddle_deep)\n",
    "    # draw the ball\n",
    "    ball(ballx, bally, ballradius)\n",
    "    screen_update()\n",
    "\n",
    "    clock.tick(gamespeed)\n",
    "\n",
    "# quit the game\n",
    "pygame.quit()"
   ]
  },
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   "source": []
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