Hello, I am fairly new to Xcode & swift. I have been following a tutorial on YouTube entitled "solo mission" In this tutorial it uses a slightly older version of Xcode which means some of the code needs to be updated. I have managed to update the code to which there is no errors, but the "spawnEnemy" section is not spawning the enemy's as described in the video. This is the code I have for the spawning enemy's;    ///SPAWNING NOT WORKING///          func spawnEnemy(){                  let randomXStart = random(min: gameArea.minX, max: gameArea.maxX)         let randomXEnd = random(min: gameArea.minX, max: gameArea.maxX)                  let startPoint = CGPoint(x: randomXStart, y: self.size.height * 1.2)         let endPoint = CGPoint(x: randomXEnd, y: -self.size.height * 0.2)                      let enemy = SKSpriteNode(imageNamed: "enemyShip")         enemy.setScale(1)         enemy.position = startPoint         enemy.zPosition = 2         self.addChild(enemy)                      let moveEnemy = SKAction.move(to: endPoint, duration: 1.5)         let deleteEnemy = SKAction.removeFromParent()         let enemySequence = SKAction.sequence([moveEnemy, deleteEnemy])         enemy.run(enemySequence)                      let dx = endPoint.x - startPoint.x         let dy = endPoint.y - startPoint.y         let amountToRotate = atan2(dy,dx)         enemy.zRotation = amountToRotate                  } Can anyone help me figure out why this is not working? Thank you in advance