PowerShell, 130 bytes

$x=' '*52+(($args|% t*y)-join' '*4)
for(;$x-match'  '){write-host "`r$(-join($x=$x-replace'(?<!  .*)  ')[0..50])  "-n
sleep -m 99}

Try it online!

This script does not remove spaces from the arguments in contrast to Joey's script.

TIO does not display the output correctly. With Powershell console, you get the scrolling marqueeline.