MC turtle harvest script

print "[!]Harvester ready for action!"

--customization
fieldsizex=9
fieldsizey=9

minfuel=1500 --the minimum amount of fuel we should stock up on when done

--system variables, do not edit
od = true --am I going in the Outward Direction
df = false --done farming


--function declarations
function movePlace() --harvests, collects, replants, and moves
    turtle.digDown()
    turtle.suckDown(5)
    turtle.placeDown()
    turtle.forward()
end
function moveCollect() --collects the crops as it comes back
    turtle.suckDown(5)
    turtle.forward()
end
function waitFourMinutes()
    print "[!]Sleeping for 4 minutes"
    os.sleep(240)
end



--main proccesses
while true do

--prepare
turtle.forward()
turtle.turnLeft()

--farm
for y=1,fieldsizey do
    for x=1,fieldsizex-1 do --harvest across the field
        movePlace()
    end
    turtle.turnRight() --spin around
    turtle.digDown()
    turtle.suckDown(5)
    turtle.placeDown()
    turtle.turnRight()
    od = false
    for x=1,fieldsizex-1 do --collect accross the field
        moveCollect()
    end



    if y==fieldsizey then --we are done, so we need to go home
        print "[!]Done farming!"

        turtle.turnRight()
        for i=0,fieldsizey do turtle.forward() end
        df = true
        break
    else -- we need to hook left and make another run
        turtle.turnLeft()
        moveCollect()
        turtle.turnLeft()
    end

end


--dump items
print "[!]Dumping items..."
for i=1,16 do --go through each slot
    turtle.select(i)
    count = turtle.getItemCount() --count the items in each slot
    if count ~= 0 then
        turtle.dropDown(count) --if there are any dump them into the chest
    end
end

--refuel
print "[!]Checking if I need fuel..."
i = 1
print(" - Fuel " .. turtle.getFuelLevel())
while turtle.getFuelLevel() < minfuel do
    if turtle.suck(1) == false then --theres no more in the chest!!!
        print "[!]The fuel chest is out of fuel!!!"
        break
    end
    turtle.refuel(1)

    i = i+1
    if math.fmod(i,10) == 0 then
        print(" - Fuel " .. turtle.getFuelLevel())
    end
    end
    print "[!]Done refueling!"

    turtle.turnRight()
    turtle.turnRight()

    waitFourMinutes()

    while rs.getAnalogSignal("left") < 1 do
        print "[!] Request signal not high enough"
        waitFourMinutes()
    end
end