A large bamboo farm that harvervests the bamboo with a flying machine. An observer detects the bamboo on the corner and when it reaches it's 12th height it will activate the flying machine and start the harvesting.

Material List:
Glass: 1231
Block of Iron: 811
Powered Rail: 520
Dirt: 449
Oak Leaves: 72
Block of Redstone: 60
Observer: 47
Redstone Dust: 42
Sticky Piston: 25
Dropper: 20
Hopper: 20
Rail: 20
Redstone Comparator: 20
Slime Block: 18
Furnace: 3
Redstone Repeater: 3
Water Bucket: 3
Iron Trapdoor: 2
Lime Stained Glass: 2
Lever: 1