如何让SKSpriteNode来回遵循相同的路径？

import SpriteKit

class GameScene: SKScene {
    override func didMove(to view: SKView) {
        let path = createPath()
        let moveAlongPath = SKAction.move(to: path.point(at: 1), duration: 2)
        let reversePath = SKAction.move(to: path.point(at: 0), duration: 2)
        let sequence = SKAction.sequence([moveAlongPath, reversePath])
        let repeat = SKAction.repeatForever(sequence)
        
        let sprite = SKSpriteNode(imageNamed: "player")
        sprite.position = path.point(at: 0)
        addChild(sprite)
        
        sprite.run(repeat, withKey: "moveAlongPath")
    }
    
    func createPath() -> SKPath {
        let path = SKPath()
        path.moveTo(x: 100, y: 100)
        path.addLine(to: x: 200, y: 200)
        path.addLine(to: x: 300, y: 100)
        path.close()
        return path
    }
}