import SpriteKit

class GameScene: SKScene {

var bird = SKSpriteNode()

override func didMove(to view: SKView) {
    /* Setup your scene here */

    //Physics
    self.physicsWorld.gravity=CGVector(dx: 0.0, dy: -5.0);

    //Bird
    let BirdTextures = (imageNamed:  "bird") //Expression Type(imageNamed: String) is ambiguous without more context.
    BirdTextures.filteringMode = SKTextureFilteringMode.Nearest

    bird = SKSpriteNode(texture : BirdTextures)
    bird.setScale(0.5)
    bird.position = CGPoint(x: self.frame.size.width * 0.35, y: self.frame.size.height * 0.6)