How to solve the bead puzzle at the wall next to the locked door.
Positions of the Beads
You get the positions of the beads by focalising the telescope on the zodiac sign of the eagle which is the only constellation you can find.
Click on the telescope and then use the dial on the right side to focalise on the two stars. Then drag the picture a little to the bottom left to find the full constellation.
Go to the wall puzzle at the second (locked) door and move the green beads according to the positions on the image so they form together with the red beads the zodiac eagle: