Expected Declaration Swift (Sprite Kit) - xcode

Question

I'm using Xcode 7 with swift and when I type
class Block {
var Block = SKShapeNode(circleOfRadius: 15)
Block.fillColor = SKColor.redColor() //Error Here
Block.physicsBody = SKPhysicsBody(circleOfRadius: 15)
Block.physicsBody?.affectedByGravity = true
Block.physicsBody?.restitution = 0
Block.physicsbody?.LinearDamping = 0
self.addChild(Block)
It gives me an error that says "expected declaration" (on the line with the comment) and I don't know why

Answer 1

There are some errors:
You have a class and are trying to change class properties outside the scope of a method or an initializer.
The line Block.physicsbody?.LinearDamping = 0 should be Block.physicsBody?.linearDamping = 0; case-sensitivity.
You name your SKShapeNode instance as Block, the same name as your class. By naming convention, class (type) names begin with Capital letters, whereas class properties use small letters in their names.
With these three fixed, we can proceed to looking at your scene.
With help from Leo Dabus (thanks!), we should have enough to set you up with a minimal working example (using your code) of the SKScene:
class GameScene: SKScene {
override func didMoveToView(view: SKView) {
let block = SKShapeNode(circleOfRadius: 15)
// you will also need to set your node initial position
// if you would like your red circle to fall from the middle of the top of your scene you need to use the scene frame midX and maxY (not the view frame). the scene it is not necessarily the same size of your view)
block.position = CGPoint(x: scene!.frame.midX, y: scene!.frame.maxY)
block.fillColor = SKColor.redColor()
block.physicsBody = SKPhysicsBody(circleOfRadius: 15)
block.physicsBody?.affectedByGravity = true
block.physicsBody?.restitution = 0
block.physicsBody?.linearDamping = 0
self.addChild(block)
}
// ...
}