Added starter files

index.js

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+const fs = require("fs");
+const myArgs = process.argv.slice(2);
+const { createCanvas, loadImage } = require("canvas");
+const { layers, width, height } = require("./input/config.js");
+const console = require("console");
+const canvas = createCanvas(width, height);
+const ctx = canvas.getContext("2d");
+const editionSize = myArgs.length > 0 ? Number(myArgs[0]) : 1;
+var metadataList = [];
+var attributesList = [];
+var dnaList = [];
+
+const saveImage = (_editionCount) => {
+  fs.writeFileSync(
+    `./output/${_editionCount}.png`,
+    canvas.toBuffer("image/png")
+  );
+};
+
+const signImage = (_sig) => {
+  ctx.fillStyle = "#000000";
+  ctx.font = "bold 30pt Courier";
+  ctx.textBaseline = "top";
+  ctx.textAlign = "left";
+  ctx.fillText(_sig, 40, 40);
+};
+
+const genColor = () => {
+  let hue = Math.floor(Math.random() * 360);
+  let pastel = `hsl(${hue}, 100%, 85%)`;
+  return pastel;
+};
+
+const drawBackground = () => {
+  ctx.fillStyle = genColor();
+  ctx.fillRect(0, 0, width, height);
+};
+
+const addMetadata = (_dna, _edition) => {
+  let dateTime = Date.now();
+  let tempMetadata = {
+    dna: _dna,
+    edition: _edition,
+    date: dateTime,
+    attributes: attributesList,
+  };
+  metadataList.push(tempMetadata);
+  attributesList = [];
+};
+
+const addAttributes = (_element) => {
+  let selectedElement = _element.layer.selectedElement;
+  attributesList.push({
+    name: selectedElement.name,
+    rarity: selectedElement.rarity,
+  });
+};
+
+const loadLayerImg = async (_layer) => {
+  return new Promise(async (resolve) => {
+    const image = await loadImage(
+      `${_layer.location}${_layer.selectedElement.fileName}`
+    );
+    resolve({ layer: _layer, loadedImage: image });
+  });
+};
+
+const drawElement = (_element) => {
+  ctx.drawImage(
+    _element.loadedImage,
+    _element.layer.position.x,
+    _element.layer.position.y,
+    _element.layer.size.width,
+    _element.layer.size.height
+  );
+  addAttributes(_element);
+};
+
+const constructLayerToDna = (_dna, _layers) => {
+  let DnaSegment = _dna.toString().match(/.{1,2}/g);
+  let mappedDnaToLayers = _layers.map((layer) => {
+    let selectedElement =
+      layer.elements[parseInt(DnaSegment) % layer.elements.length];
+    return {
+      location: layer.location,
+      position: layer.position,
+      size: layer.size,
+      selectedElement: selectedElement,
+    };
+  });
+  return mappedDnaToLayers;
+};
+
+const isDnaUnique = (_DnaList = [], _dna) => {
+  let foundDna = _DnaList.find((i) => i === _dna);
+  return foundDna == undefined ? true : false;
+};
+
+const createDna = (_len) => {
+  let randNum = Math.floor(
+    Number(`1e${_len}`) + Math.random() * Number(`9e${_len}`)
+  );
+  return randNum;
+};
+
+const writeMetaData = (_data) => {
+  fs.writeFileSync("./output/_metadata.json", _data);
+};
+
+const startCreating = async () => {
+  writeMetaData("");
+  let editionCount = 1;
+  while (editionCount <= editionSize) {
+    console.log(editionCount);
+
+    let newDna = createDna(layers.length * 2 - 1);
+    console.log(dnaList);
+    if (isDnaUnique(dnaList, newDna)) {
+      let results = constructLayerToDna(newDna, layers);
+      let loadedElements = []; //promise array
+
+      results.forEach((layer) => {
+        loadedElements.push(loadLayerImg(layer));
+      });
+
+      await Promise.all(loadedElements).then((elementArray) => {
+        drawBackground();
+        elementArray.forEach((element) => {
+          drawElement(element);
+        });
+        signImage(`#${editionCount}`);
+        saveImage(editionCount);
+        addMetadata(newDna, editionCount);
+        console.log(`Created edition: ${editionCount} with DNA: ${newDna}`);
+      });
+      dnaList.push(newDna);
+      editionCount++;
+    } else {
+      console.log("DNA exists!");
+    }
+  }
+  writeMetaData(JSON.stringify(metadataList));
+};
+
+startCreating();

input/config.js

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+const fs = require("fs");
+const width = 1000;
+const height = 1000;
+const dir = __dirname;
+const rarity = [
+  { key: "", val: "original" },
+  { key: "_r", val: "rare" },
+  { key: "_sr", val: "super rare" },
+];
+
+const addRarity = (_str) => {
+  let itemRarity;
+  rarity.forEach((r) => {
+    if (_str.includes(r.key)) {
+      itemRarity = r.val;
+    }
+  });
+  return itemRarity;
+};
+
+const cleanName = (_str) => {
+  let name = _str.slice(0, -4);
+  rarity.forEach((r) => {
+    name = name.replace(r.key, "");
+  });
+  return name;
+};
+
+const getElements = (path) => {
+  return fs
+    .readdirSync(path)
+    .filter((item) => !/(^|\/)\.[^\/\.]/g.test(item))
+    .map((i, index) => {
+      return {
+        id: index + 1,
+        name: cleanName(i),
+        fileName: i,
+        rarity: addRarity(i),
+      };
+    });
+};
+
+const layers = [
+  {
+    location: `${dir}/ball/`,
+    elements: getElements(`${dir}/ball/`),
+    position: { x: 0, y: 0 },
+    size: { width: width, height: height },
+  },
+  {
+    location: `${dir}/eye color/`,
+    elements: getElements(`${dir}/eye color/`),
+    position: { x: 0, y: 0 },
+    size: { width: width, height: height },
+  },
+  {
+    location: `${dir}/iris/`,
+    elements: getElements(`${dir}/iris/`),
+    position: { x: 0, y: 0 },
+    size: { width: width, height: height },
+  },
+  {
+    location: `${dir}/shine/`,
+    elements: getElements(`${dir}/shine/`),
+    position: { x: 0, y: 0 },
+    size: { width: width, height: height },
+  },
+];
+
+module.exports = { layers, width, height };

output/_metadata.json

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+[{"dna":20996708,"edition":1,"date":1629845157380,"attributes":[{"name":"red eye ball","rarity":"super rare"},{"name":"red big","rarity":"super rare"},{"name":"small","rarity":"original"},{"name":"shapes","rarity":"original"}]},{"dna":56699851,"edition":2,"date":1629845157626,"attributes":[{"name":"red eye ball","rarity":"super rare"},{"name":"red big","rarity":"super rare"},{"name":"small","rarity":"original"},{"name":"shapes","rarity":"original"}]},{"dna":79067299,"edition":3,"date":1629845157805,"attributes":[{"name":"white eye ball","rarity":"original"},{"name":"purple small","rarity":"original"},{"name":"medium","rarity":"original"},{"name":"shapes","rarity":"original"}]}]

package.json

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+{
+  "name": "art_generator",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Daniel Eugene Botha",
+  "license": "ISC",
+  "dependencies": {
+    "all": "^0.0.0",
+    "canvas": "^2.8.0"
+  }
+}