How can I keep the guards from noticing me when they return?

Hint 1 of 7:

You need to find a hiding place first.

Hint 2 of 7:

It's the same one that you've been using all along.

Hint 3 of 7:

Hide behind the pillar in the alcove.

Hint 4 of 7:

The painting is what's giving you away.

Hint 5 of 7:

You might want to put it back in place.

Hint 6 of 7:

Put the nail back in the wall.

Hint 7 of 7:

Hang the painting back up.