Using sleep function with Panels

Hi everyone,

I'm writing a function to give the user a simple alert in my functions. I would use DoAlert for this but I don't want them to have to click anything. I'd like a message to popup on the screen, stay there for a couple of seconds and then be closed automatically. Right now I've come up with the code below but when I run it I don't get the behaviour I'm expecting. It seems to open the panel, run the sleep command, and then load the titlebox command. I start out with a blank panel for a second or two then the text briefly appears before the window is killed again. Should I be using a different function for this?

Function procComp(atext)
    String atext

    NewPanel /W=(911,369,1311,505)/N=Alert
    TitleBox title0,pos={105,54},size={181,21},title=atext,font="Arial",fSize=18,frame=0
   
    sleep/s 2
    KillWindow Alert

End

Thank you!
Andrea