Measure and cut pine boards into the required lengths to form the pentomino shapes. Ensure all cuts are precise for tight joints.

Sand all cut edges and surfaces thoroughly with various grits of sandpaper until smooth.

Assemble the individual pentomino units using wood glue and wood screws. Clamp pieces firmly and allow glue to dry completely.

Apply wood dye evenly to all surfaces of the assembled pentomino shelves. Follow product instructions for drying times and multiple coats.

Once the dye is completely dry, apply a wood sealant to protect the finish and enhance durability. Allow to cure according to product directions.

Arrange your pentomino shelves in desired configurations and mount them securely to the wall using appropriate hardware (not included in materials list).