const perfect = new headbreaker.Canvas('perfect-canvas', {
pieceSize: 100, proximity: 20,
strokeWidth: 2, strokeColor: '#00200B',
structure: { right: headbreaker.Tab, down: headbreaker.Slot },
metadata: { id: 'a', targetPosition: { x: 100, y: 100 }, color: '#0EC430' }
structure: { right: headbreaker.Slot, left: headbreaker.Slot },
metadata: { id: 'b', targetPosition: { x: 200, y: 100 }, color: '#098520' }
structure: { down: headbreaker.Tab, left: headbreaker.Tab },
metadata: { id: 'c', targetPosition: { x: 330, y: 80 }, color: '#04380D' }