How to display form submission details on the webpage?

hello, how can put a form on my website which when you submit the info displays the results on the webpage as a list, for example if i submitted, blue, green and yellow in my form it would show up as:

Blue
Green
Yellow

and how can i make categories for that, like if i submitted 1, 2 and 3 aswell it would show:

Colours
Blue
Green
Yellow

Numbers
1
2
3

Thanks

What do you use ASP, PHP, something else ?