harvest

local plants = 7
local growth = 3
local runs = 0

function harvest()
  local steps = plants
  while (steps > 0) do
    steps = steps-1
    turtle.digDown()
    turtle.forward()
  end
end

while (true) do
  harvest()
  runs = runs+1
  sleep(growth)
  turtle.turnRight()
  turtle.turnRight()
  if (runs%2==0) then
    turtle.select(2)
    turtle.drop()
    turtle.select(3)
    turtle.drop()
    turtle.select(2)
  end
end