How to create GIF from frames base64?

How create gif from base64? and print gifbase64 example: res.send(GifBase64);

```
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var urlencodedParser = bodyParser.urlencoded(({ limit: '250mb', extended: true, parameterLimit: 100 }));
app.post('/', urlencodedParser, function(req,res){
var frames = JSON.parse(req.body.frames);
//frames = ["data:image/jpeg;base64,......","data:image/jpe...",,"data:ima...", "..."];
});
```