press the up, left, down, right keys or the w ,a, s, d keys when the arrows flying upwards hit they grey arrow in the same direction as it. if for some reason the arrows become unclickable, that's because the chart code ends at that point. to edit the chart, go into one of the coloured arrows and you'll see multiple block codes having a variable of the arrow position, with each one having a number, duplicate the latest one and change the variable number by 1 and change the wait time.
future updates: - down-scroll option credits: mostly to ninjamuffin99 for creating friday night funkin