protocol Context {
  var itemsCount: Float { get }
}

class Position {
  x: Float
  y: Float
  
  constructor(x, y) {
    this.x = x
    this.y = y
  }
}

func memoryItemPositions(c: Context) -> Position[] {
  var pos: Position[] = []
  for (var i = 0; i < c.itemsCount; i++) {
    let row = Math.floor(i / 4)
    let x = memoryGap() + (i - row * 4) * memoryGap()
    let y = memoryGap() + row * memoryGap()
    pos.push(new Position(x, y))
  }
  return pos
}