Hello,
is there a chance when you type command /show to appear hudmessage in position No.1 ? But when you type the same command 2nd time, to appear again this hudmessage, but in position No.2 ? And the last 3rd time, when you type the same command, this message appear in position No.3... And after this operation back again... same command -> 1st position... same command -> 2nd position... same command -> 3rd position.