As the plant grows into the shape of the peacock frame, clip off any stems that stray outside the wire. Each season, shear to keep the bird's shape. Allow the bush to grow an inch or two outside the frame to hide the wires. You could cut out in the middle of hedges a rustic tunnel or make a palisade by braiding branches. The braided or woven branches create a canopy or solid wall.
Intertwined branches grow together.
These natural grafts support an arch or roof. You make a rustic pleached tunnel by planting a row of saplings on either side of a path. Tie the tops together. Fashion trees to a series of arch-shaped supports. To make windows in hedges, you'll need a trashcan lid or window screen for a template and pruning shears.