Represent another pattern’s part:

Another pattern’s part:

Represent the same way the remained pattern’s part.

Keep connected now only those layers that form the bird’s silhouette. Combine them (Ctrl + Shift + E) and we’ll get:

Apply the indicated parameters below
Blending Options-Gradient Overlay

Gradient’s parameters

We’ll get:

Connect the layer that has a dark background, highlighted in the center. Place the bird’s silhouette above this layer.

The final result!