Note: Structure, Section > 1st block > 2nd block. 1st block sets 100% width & 300vh. 2nd block positions fixed & sets 0px width & 100vh. Page trigger, While page is scrolling, apply size(width0% to 100%) and scale(1 to 0.7) to 2nd block. Section 2 top margin 400vh(the reason of timing). → Next