I just did this myself and I THINK I may have a tip that proved very helpful for me. I'm good at these timed button presses but I could not get this easily. I realized the Left and Right was screwing me over because I kept delaying. (First fix of that was covering the entire screen except the part where the buttons show up) I still couldn't get it, but did better.

Well that was a tip I found while googling, here's my actual tip. I started noticing that it was ALWAYS right first, and usually not long after it begun so I had my thumb on the right side on the D-Pad then once I hit it I moved it SLIGHTLY to the left side because left would be next and I'm surprised it made such a big difference.

I wanted people to see if it worked for them as well as it worked for me, so if anyone can try it and see if it works for them. Please spread it around if it does, it saved me so much annoyance and I hope it would help others xD

(I'm totally bumping this topic xD Sorry)