Try this:
Name the target "R1".
In the init field, I think you put something like this "this allowpopup false".
Then for a script put the following in:
R1 animate["terc",0];
~3
R1 animate["terc",1];
Now when the script executes, it will either go up for 3 secs or stay down for 3 secs, dont remember which...