                
                let x = CGFloat(i) * (self.size.width / CGFloat(self.springs.count))
                let y = self.size.height + spring.height
                path.addLineToPoint(CGPoint(x: x, y: y))
            }
            path.addLineToPoint(CGPoint(x: self.size.width, y: 0))
        }
        path.closePath()
        return path.CGPath
    }
}