OpenSCAD external NodeJS animation demo

wlog.js

var fs = require("fs");
var writer;

function wait(ms) {
  return new Promise(function (resolve) {
    setTimeout(resolve, ms);
  });
}
function rad2deg(r) {
    return r / Math.PI * 180;
}

function out(x) {
    return (typeof(x) === 'object') ? JSON.stringify(x) : x;
}
function wlog(...s) {
    var i;
    writer.write(out(s[0]));
    for(i=1; i<s.length; i = i + 1) {
        writer.write(" " + out(s[i]));
    }
    writer.write("\n");
}

async function amain() {
    var i = 0;
    var coords=[[0,0,0],[1,0,0],[0,2,0],[0,0,3]];
    var col=[[1,1,1],[0,1,0]];

    while (true) {
        writer = fs.createWriteStream('x.scad');
        wlog("$vpr = [",-rad2deg(-Math.PI/4),",0,",
                        -rad2deg(Math.atan2(-0.5, 0.5)),"];");
        wlog("$fn = 25;");
        wlog("$vpt = [0,0,0];");
        wlog("module vertex(v, c) { color(c) translate(v) sphere(0.5); }");
        wlog("vertex(", coords[i%4], ",", col[i%2], ");");
        writer.close();

        await wait(1200);

        i = i + 1;
    }
}

amain();

So all you need to do after running "nodejs wlog.js" is to open "x.scad" in OpenSCAD:
https://forums.raspberrypi.com/viewtopic.php?p=2014370#p2014370