Farm v1.0

--[[
Version 1.0
Written by: Tom Nordloh (Notze)

Create a rectangular field (configured
for a 9x9 field but you can make your
own adjustments in the lower section)
and place a chest on the left side
infront of it. Place the Turtle upon
the chest faceing towards the field.
Place the following things into the
Turtles inventory:
Slot 1: cole
Slot 2: seeds
]]

-- make your adjustments here
local int x = 9 -- from Turtle's direction right
local int y = 9 -- in Turtle's looking direction
-- end of adjustments

function main()
    -- refuel in dependency to field size
    refuel(1+(x*y+x+y)/96)

    -- harvest and plant
    local boolean nextEndUp = true
    forward(y)
    for j=2, x, 1 do

        if nextEndUp then
            turnRight()
            forward(1)
            turnRight()
            forward(y-1)
            nextEndUp = false
        else
            turnLeft()
            forward(1)
            turnLeft()
            forward(y-1)
            nextEndUp = true
        end

    end

    -- return to chest
    if nextEndUp then
        back(y)
        turnRight()
        back(x-1)
        turnLeft()
    else
        forward(1)
        turnLeft()
        back(x-1)
        turnLeft()
    end

    -- place everything but cole and seeds in the Chest
    for i=3, 16 do
        turtle.select(i)
        turtle.dropDown()
    end
end

function refuel(amount)
    if turtle.getFuelLevel() < 96*amount then
        turtle.select(1)
        turtle.refuel(amount)
    end
end

function forward(length)
    for i=1, length, 1 do
        turtle.forward()
        turtle.digDown()
        turtle.select(2)
        turtle.placeDown()
    end
end

function back(length)
    for i=1, length, 1 do
        turtle.back()
    end
end

function turnRight()
    turtle.turnRight()
end

function turnLeft()
    turtle.turnLeft()
end

function turnAround()
    turnRight()
    turnRight()
end

main()