I learned how to create a phone graphic using CSS & HTML coding on W3Schools
https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_device_smartphone
I learned how to create a laptop graphic using CSS & HTML coding on W3Schools
https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_device_laptop
I learned how to create a roll over flip box on W3Schools
https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_flip_box
I learned to assemble a slideshow from W3School
https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow