Saving HTML 5 Canvas Into Files Using Client And Server Scripting

The image below consists of randomly generated circles drawn on HTML 5 canvas object.
You can enter a parameter below. You can press the Save button to save the image.
Parameter:
Tutorial on how this is done can be read here (it uses HTML5 Canvas, AJAX and PHP):
http://permadi.com/2016/07/html5-saving-canvas-image-data-and-passing-parameters-using-html-form-and-php/

Wait for a while after clicking the button and the filename of the image will be shown to you.