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Hello, i'm new here and i'm to rebuild some parts of a existing page. I would like to create the same as this page has done with gsap: https://www.the-newel.com/ I'm trying to rebuild the part with the blue background. That the header flow in and afterwards change the colour. Then the header will be fixed in the background and the other coloumns flow above during scrolling down or up. thank you for your help!! A