gistfile1.scala

    Command(
      name = "fib-tower",
      desc = "create a tower from the fib numbers",
      body = args(int ~ material){ case (p, i ~ m) =>
        lazy val fibs: Stream[Int] = 0 #:: 1 #:: fibs.zip(fibs.tail).map{case (i,j) => i+j}
        val xBlocks: Stream[Block] = p.world.fromX(p.loc)
        for{
          (startBlock,n) <- xBlocks.zip(fibs take i)
          towerBlock     <- startBlock.andBlocksAbove take n
        } towerBlock changeTo m
      }
    )