Well, If I understand, you want your headlights to be in the half-open half-closed position. this is actually simple to do.
Now, if your celica has electric solenoids (which I now believe to be the case) there are a couple methods.
One way you can do this on your car is to get a Sleepy-Eye controller; You can get it at the link below... This will work on your car for sure:http://nlmotoring.com/catalog/advanced_search_result.php?search_in_description=1&keywords=sleepy
You can get info from club4AG on the other methods. the methods used on the AE86 should work on your celica. You can read up on the methods available there:http://forums.club4ag.com/topic.asp?ARCHIVE=true&TOPIC_ID=37236