Hmm ok for one you have one closeing bracket to many.#2 this will only aline on users mIRC screens depending on what font options they have set.I edited this to show on my screen using Fixedsys regular size 9 font also added a longer pole.just casue.

alias usa {
  .say  1,8__
  .say 1,8/  \\
  .say 1,8\\  /
  .say 1,8| 1,8|
  .say 1,8| 1,8|0,12* * * * * * * * * *4,4_____________________|
  .say 1,8| 1,8|0,12* * * * * * * * * *0,0_____________________|
  .say 1,8| 1,8|0,12* * * * * * * * * *4,4_____________________|
  .say 1,8| 1,8|0,12* * * * * * * * * *0,0_____________________|
  .say 1,8| 1,8|0,12* * * * * * * * * *4,4_____________________|
  .say 1,8| 1,8|0,0______________________________________|
  .say 1,8| 1,8|4,4______________________________________|
  .say 1,8| 1,8|0,0______________________________________|
  .say 1,8| 1,8|4,4______________________________________|
  .say 1,8| 1,8|0,0______________________________________|
  .say 1,8| 1,8|4,4______________________________________|
  .say 1,8| 1,8|0,0______________________________________|
  .say 1,8| 1,8|4,4______________________________________|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
  .say 1,8| 1,8|
}