Coding my FirstPlugin

screen -r

[18:32:45] [Server thread/INFO]: Preparing start region for dimension minecraft:overworld
[18:32:45] [Worker-Main-1/INFO]: Preparing spawn area: 2%
[18:32:47] [Worker-Main-1/INFO]: Preparing spawn area: 2%
[18:32:47] [Worker-Main-1/INFO]: Preparing spawn area: 2%
[18:32:47] [Worker-Main-3/INFO]: Preparing spawn area: 2%
[18:32:47] [Worker-Main-2/INFO]: Preparing spawn area: 2%
[18:32:48] [Worker-Main-2/INFO]: Preparing spawn area: 2%
[18:32:48] [Worker-Main-1/INFO]: Preparing spawn area: 18%
[18:32:49] [Worker-Main-1/INFO]: Preparing spawn area: 18%
[18:32:49] [Worker-Main-1/INFO]: Preparing spawn area: 18%
[18:32:50] [Worker-Main-3/INFO]: Preparing spawn area: 44%
[18:32:50] [Worker-Main-1/INFO]: Preparing spawn area: 51%
[18:32:51] [Worker-Main-3/INFO]: Preparing spawn area: 51%
[18:32:51] [Worker-Main-1/INFO]: Preparing spawn area: 51%
[18:32:52] [Server thread/INFO]: Time elapsed: 6536 ms
[18:32:52] [Server thread/INFO]: Preparing start region for dimension minecraft:the_nether
[18:32:52] [Worker-Main-2/INFO]: Preparing spawn area: 2%
[18:32:52] [Worker-Main-1/INFO]: Preparing spawn area: 2%
[18:32:53] [Worker-Main-3/INFO]: Preparing spawn area: 18%
[18:32:53] [Worker-Main-3/INFO]: Preparing spawn area: 18%
[18:32:54] [Worker-Main-3/INFO]: Preparing spawn area: 51%
[18:32:54] [Worker-Main-3/INFO]: Preparing spawn area: 51%
[18:32:55] [Worker-Main-3/INFO]: Preparing spawn area: 51%
[18:32:55] [Server thread/INFO]: Time elapsed: 3119 ms
[18:32:55] [Server thread/INFO]: Preparing start region for dimension minecraft:the_end
[18:32:55] [Worker-Main-2/INFO]: Preparing spawn area: 2%
[18:32:55] [Worker-Main-3/INFO]: Preparing spawn area: 51%
[18:32:56] [Server thread/INFO]: Time elapsed: 595 ms
[18:32:56] [Server thread/INFO]: [FirstPlugin] Enabling FirstPlugin v1.0-SNAPSHOT
[18:32:56] [Server thread/INFO]: My First Plugin Ever Made
[18:32:56] [Server thread/INFO]: Done (20.651s)! For help, type “help”