Hello,

I am working through DiveIntoSpriteKit and run into a probably minor thing but can not solve it. When I set gameTimer I get the error Cannot find 'createEnemy' in scope. I expect it to be the wrong place but could not figure out where the right one is. What do I do wrong?

import SpriteKit

@objcMembers

class GameScene: SKScene {

    let player = SKSpriteNode(imageNamed: "player-rocket.png")
    var touchingPlayer = false
    var gameTimer: Timer?

    override func didMove(to view: SKView) {

        let background = SKSpriteNode(imageNamed: "space.jpg")
        background.zPosition = -1
        addChild(background)

        if let particles = SKEmitterNode(fileNamed: "SpaceDust") {
            particles.advanceSimulationTime(10)
            particles.position.x = 512
            addChild(particles)
        }

        player.position.x = -400
        player.zPosition = 1
        addChild(player)

        gameTimer = Timer.scheduledTimer(timeInterval: 0.35, target: self, selector: #selector(createEnemy), userInfo: nil, repeats: true)

    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?){

    guard let touch = touches.first else { return }
    let location = touch.location(in: self)
    let tappedNodes = nodes(at: location)
        if tappedNodes.contains(player) {
            touchingPlayer = true
        }

    }

    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        guard touchingPlayer else { return }
        guard let touch = touches.first else { return }
        let location = touch.location(in: self)
        player.position = location
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {

        touchingPlayer = false

    }

    override func update(_ currentTime: TimeInterval) {

        func createEnemy() {

            let sprite = SKSpriteNode(imageNamed: "asteroid")
            sprite.position = CGPoint(x: 1200, y: Int.random(in: -350...350))
            sprite.name = "enemy"
            sprite.zPosition = 1
            addChild(sprite)

            sprite.physicsBody = SKPhysicsBody(texture: sprite.texture!, size: sprite.size)

            sprite.physicsBody?.velocity = CGVector(dx: -500, dy: 0)

            sprite.physicsBody?.linearDamping = 0

            }
        }
    }