{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Blockly deconstructed\n",
    "\n",
    "Consider this [blockly program](https://blockly.games/bird?lang=en&level=2#562ubo).\n",
    "\n",
    "![blockly-bird](blockly-bird.png)\n",
    "\n",
    "This is actually a full computer program! When you succesfully complete it, you can see the automatic translation to Javascript. (Javascript is obviously a different programming language than Python, but the important points we can discuss anyway.)\n",
    "\n",
    "```\n",
    "if (noWorm()) {\n",
    "  heading(0);\n",
    "} else {\n",
    "  heading(90);\n",
    "}\n",
    "```\n",
    "\n",
    "if we would re-write this in Python, it would be:\n",
    "\n",
    "```\n",
    "if noWorm():\n",
    "    heading(0)\n",
    "else:\n",
    "    heading(90)\n",
    "```"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's discuss what is going on here.\n",
    "\n",
    "(Discussion of computer program, computer, operating system, external world.)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Consider this [blockly program](https://blockly.games/music?lang=en&level=3#juok8w).\n",
    "\n",
    "![blockly](blockly.png)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The main conceptual new thing is the use of **functions**."
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.11.8"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 4
}
