Squares are some of the hardest patterns you can find in osu!. Nearly every player has problems with properly doing them.
They can appear in any kind of spacing and rotation.
Some mappers even go a step further and map multiple squares in a row in the form of tornado jumps.
There are several methods that helped me succeed certain square patterns. The most important thing that all of those methods have in common is:
Don't look at the pattern as a whole. Ever.However this can be quite hard. What really helps is trying to see the square as 2 lines instead of a square or alternatively 1 HitCircle, 1 line and another HitCircle. Another method is to sacrifice accuracy and hit the first 2 HitCircles of the square too early on purpose, this is not recommended unless you
absolutely need to fc the pattern.
[... Not finished yet, more illustrations coming...]