protocol Context {
  var itemsCount: Float { get }
}

protocol Position {
  var x: Float { get }
  var y: Float { get }
}

func memoryGap() -> Float {
  return memorySide() + memorySpace()
}

func memorySide() -> Float {
  return 50
}

func memorySpace() -> Float {
  return 20
}

func memoryItemPositions(c: Context) -> [Position] {
  var pos: [Position] = []

  let ids = Array.from(Array(c.itemsCount).keys());
  ids.forEach(i => {
    let row = Math.floor(i / 4)
    let x = memoryGap() + (i - row * 4) * memoryGap()
    let y = memoryGap() + row * memoryGap()
    // @ts-ignore
    pos.push(memoryCreatePosition(x, y))
  })
  return pos
}