Website Customisation

The website has been built on big commerce and this is where the customisation is required as part of an existing website. I require a page to be modified to allow the user to design their own product by selecting a shape, size, colour, design of the product and adding text which will appear on the product image in live time. There should be a corresponding price based on selections made and the final product must be able to be added to cart for purchase. Thank you.