how to embedded jotform to HTML script ??

If you mean embedding an html code into JotForm,  you can do it by getting source code of your form. This is the user guide about how to get source code of a form.

https://www.jotform.com/help/104-How-to-get-the-Full-Source-Code-of-your-Form

You need to download source code and host it on your server and then you can apply css fixation on it. 

However, If you mean to embed a form to your website, you may check below guidance. 

https://www.jotform.com/help/67-Which-form-embed-code-should-I-use

Please let us know, if you need any further assistance from our side.