As soon as the light beam appears to focus on another (after doing the "fill with red" puzzle) item - immediately move to that item so that the light beams are kept.
If too slow - the beam connections will break and you have to start from scratch.

Catch the attention of the man:

Right click to open the notebook. Open items. Select the mirror.

See the mirror at right and a hand cursor on the window. Click the window.

See the inside of the room.

The object of the puzzle is to get beams of light to surround the man and catch his attention.

Click on the bottle in front of the man and see a circle and a bobbing light.

Maintain the light inside the circle until the circle is filled with red and light bounces to another item.

The beam of light from mirror to bottle on floor to lamp at right wall and then to lamp of the dresser beside the bed forms a triangle around the man and eventually shoots a beam to his face and catches his attention.