Farming Turtle (Left Side) + Update

-- Version 0.67
sleeptime = 60 * 40 -- 35 minutes
local pasteID = "http://pastebin.com/raw.php?i=zwvj3p45"
pasteContent = http.get(pasteID)
Paste = pasteContent.readAll()
pasteContent.close()
function update()
        file = fs.open("startup","r")
        contents = file.readAll()
        file.close()
        if (Paste ~= contents) then
                print("Updating program...")
                shell.run("delete","startup")
                wFile = fs.open("startup","w")
                wFile.write(Paste)
                wFile.close()
                sleep(1)
                os.reboot()
        end
end
update()
turtle.forward()
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
turtle.digDown()
for i=0,11 do
        turtle.digDown()
        turtle.forward()
end
turtle.turnRight()
turtle.forward()
turtle.digDown()
turtle.turnRight()
for i=0,11 do
        turtle.digDown()
        turtle.forward()
end
turtle.turnLeft()
turtle.forward()
turtle.digDown()
turtle.turnLeft()
for i=0,11 do
        turtle.digDown()
        turtle.forward()
end
turtle.turnLeft()
for i=0,2 do
        turtle.forward()
end
turtle.turnLeft()
for i=0,10 do
        turtle.forward() -- go home
end
turtle.select(1)
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
turtle.placeDown()
for i=0,11 do
        turtle.placeDown()
        turtle.forward()
end
turtle.turnRight()
turtle.forward()
turtle.placeDown()
turtle.turnRight()
for i=0,11 do
        turtle.placeDown()
        turtle.forward()
end
turtle.turnLeft()
turtle.forward()
turtle.placeDown()
turtle.turnLeft()
for i=0,11 do
        turtle.placeDown()
        turtle.forward()
end
turtle.turnLeft()
turtle.placeDown()
for i=0,2 do
        turtle.forward()
end
turtle.turnLeft()
for i=0,11 do
        turtle.forward()
end
turtle.turnLeft()
turtle.turnLeft()
sleep(sleeptime)
os.reboot()