Planter

local args = {...}
local length
local width
if (args[1] ~= nil) then
  length = tonumber(args[1])
end
if (args[2] ~= nil) then
  width = tonumber(args[2])
end

function atGround()
  local success,data = turtle.inspectDown()
  if (data ~= nil and (data.name == "minecraft:grass" or data.name == "minecraft:dirt")) then
    return true
  else
    return false
  end
end

function placeWheat()
  while (not atGround()) do
    if (not turtle.down()) then
      if (not turtle.digDown()) then
        print("Unable to go down. Please ensure there is dirt under the turtle. Then press enter.")
        read()
      end
    end
  end
  while (not turt.select("minecraft:wheat_seeds")) do
    print("Add more seeds and press enter.")
    read()
  end
  turtle.up()
  turtle.digDown()
  turtle.placeDown()
end

function moveForward()
  while (turtle.detect()) do
    while (not turtle.up()) do
      print("Vertical obstruction. Remove and press enter.")
      read()
    end
  end
  while (not turtle.forward()) do
    print("Obstruction. Trying again.")
  end
end

function row()
  for i=1,length do
    placeWheat()
    moveForward()
  end
end

function main()
  for i=1,width do
    row()
    if (i % 2 == 0) then
      turtle.turnLeft()
      moveForward()
      turtle.turnLeft()
    else
      turtle.turnRight()
      moveForward()
      turtle.turnRight()
    end
    moveForward()
  end
end

if (not fs.exists("turt")) then
    print("Installing Turt API.")
    shell.run("pastebin get 7jXkEZX6 turt")
end

os.loadAPI("turt")
main()