Turtle dig 10x10

turtle.refuel()
ai = 10
t = 0
i = 0
turn = "right"
no = "false"
while true do
        if turtle.getFuelLevel() < 10 then
            turtle.refuel()
        end

        if t > 9 then
        turtle.turnLeft()
            for i=1,10 do
                turtle.forward()
                turtle.dig()
            end



        turtle.turnRight()
        turtle.digDown()
        turtle.down()
        turtle.dig()
        turtle.forward()

        turtle.turnLeft()
        turtle.turnLeft()
        turtle.select(2)
        turtle.place()
        turtle.select(1)
        turtle.turnRight()
        turtle.turnRight()
        t = 0
        i = 1
        end
    print("Turn: ")
    print(t)
    print(" ------- ")
    print("Block: ")
    print(i)
    no = false
    turtle.dig()
    turtle.forward()
    i = i+1
    if i > 9 then
        print("Turning...")
        print(turn)
        if turn == "right" then
            turtle.turnRight()
            turtle.dig()
            turtle.forward()
            turtle.turnRight()
            turn = "left"
            no = "true"
            i = 0
            t = t+1
            print("Turned right!")
        end

        if turn == "left" then
            if no == "true" then

            else
                print("Turned left!")
                turtle.turnLeft()
                turtle.dig()
                turtle.forward()
                turtle.turnLeft()
                turn = "right"
                i = 0
                no = "true"
                t = t+1

            end
        end
    end
end