The parameters are r, g, b, transparency - 0 being fully transparent and 0,0,0 being the color black. You'd probably be better off moving using moveWindow("WhoHere",xCoordinate,yCoordinate). There may be a function to set your foreground's transpa…
You might wanna give Oasis a try, as much as I see you in the HG. Granted, it'd mean switching to Mudlet, there are people in the system clan capable of writing you an offense for a few credits.
In Settings, tab over to Input Line and uncheck the box that says, "Show text you sent." Unless you know what you're doing in the source folder, that'll be your best bet.