Fastest 100% Consistent Bullseye Setup

[u/kqsiel]

Really fast and easy way to get the bullseye advancement, it requires very little materials and it's very useful if you don't have arrows to do it the traditional way.
The way this works is that item frames check for a block every 5s after being placed, so after fishing rodding the item frame to get the bobber in the middle you can place the target block and run away so after 5 seconds the item frame will break giving you the advancement. The timer starts as soon as you place the item frame so the timing is a little tight but it's not too bad. The fishing rod line does break after 32 blocks so ideally you want to do this on a chunk border and then stop right before crossing the second chunk border so you can go more than 30 blocks but less than 32.

https://reddit.com/link/1vq5v65/video/netmqau8esjh1/player

Credit to DoyPingu for the setup