I'd like to do this

1

can someone please explain how the effect on this website is done. The part I am interested in is the way the page starts after preload with a line in the middle and grows outward and then opens into a square. I know it’s probably something very simple but I can’t seem to get a smooth looking one. I tried with masking. :hangover: Is it as simple as tweening and resizing?

http://www.bankfashion.co.uk/main.html