Origami diagram of a grand piano. How to fold a three-dimensional grand piano.

Fold the sharp corners in half

Dotted line valley fold

The sides unfold, the virtual peaks and real valleys fold, and then converge

Dotted line valley fold

Expand and aggregate, similar to the method of origami crane

Break it off as shown in the picture

Repeat on the other side

Turn over and fold the dotted line into the valley

Open it from the bottom, fold it into a square shape, and flatten it

Dotted line valley fold

The paper is too small and difficult to fold, so decisively change to larger paper

Real peaks and virtual valleys, width can be customized

Tuck it in

Dotted line valley fold, size can be customized

Expand and fold inside

Fold it up

Fold it down, paying attention to the right angle

Expand

Real peaks and virtual valleys, width can be customized

Tuck it in

Dotted line valley fold

Expand, fold in

Make this corner bigger

Repeat on the left

Expand, dotted line valley fold, aggregation

Turn over, dotted line valley fold

Stand up all three