farm

function side(long)
  for i=0, long do
    turtle.forward()
    plant()
  end
end

function turnR()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
  turtle.forward()
  turtle.turnRight()
end
function turnL()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
end

function pitstop()
  turtle.select(16)
  turtle.refuel()
  for i=2, 15 do
    turtle.select(i)
    turtle.dropDown()
  end
end

function plant()
    turtle.digDown()
    turtle.select(1)
    turtle.placeDown()
end

function returnHome()
  turtle.forward()
  turtle.turnRight()
  for i=0,13 do
    turtle.forward()
  end
  turtle.turnRight()
end

while true do
turtle.refuel()
turtle.up()
side(10)
turnR()
side(10)
turnL()
side(10)
turnR()
side(10)
turnL()
side(10)
turnR()
side(10)
turnL()
side(10)
turnR()
side(10)
turnL()
side(10)
turnR()
side(10)
returnHome()
turtle.down()
pitstop()
sleep(4000)
end