Woodpecker Sruck in the Barn

First I would like to say how much I enjoy all the awesome photography on this site. I envy your skills.
This summer you people helped me lure hummingbirds out of the same tall barn (red hibiscus placed in the door as bait), now a couple of woodpeckers are similarly "trapped" in the barn. One of them got out last night but the other seems clueless. Can anyone make a suggestion that will help?

Maybe again a feeder in an open doorway?

Resin

That's what I was thinking, as long as it's on the outside hanging but then there's always a chance of another bird getting trapped inside. Difficult.

Open every door and window in the place. They will go for the light.

Unfortunately there is light at the top of the barn but no opening up there. In order for him to see the feeder it would have to be right in one of the doors. If it attracts others perhaps one of them will be clever enough to show the woodpecker the way out!