JS lorem image https://jsfiddle.net/tripolskypetr/0ydt3xmk/

ImageGenerator.js

export default class ImageFactory {
    static _index = 0;
    static _colors = ["red", "orange", "yellow", "green", "skyblue", "blue", "cyan"];
    static _increment() {
        const self = ImageFactory;
        return self._index = (++self._index > self._colors.length - 1) ? 0 : self._index;
    }
    static createImage(height = 100, width = 100) {
        const canvas = document.createElement("canvas");
        const context = canvas.getContext("2d");
        const index = ImageFactory._increment();
        [canvas.height, canvas.width] = [height, width];
        context.fillStyle = ImageFactory._colors[index];
        context.fillRect(0, 0, width, height);
        return canvas.toDataURL("image/png");
    };
    constructor() {
        throw new Error("ImageGenerator is static factory");
    }
}
const appendImage = (isWild = false) => {
    const image = document.createElement("img");
    image.src = ImageFactory.createImage(250, 250 * (isWild ? 2 : 1));
    document.body.appendChild(image);
}

/* 
  USAGE: 

  appendImage(true);
  appendImage();

*/