turtle.refuel()
ix=3
iy=3
d=5
while d>0 do
    while turtle.detect() do
        turtle.dig()
    end
    turtle.forward()
    turtle.turnRight()
    y=iy
    while y>0 do
        x=ix-1
        while x>0 do
            while turtle.detect() do
                turtle.dig()
            end
            turtle.forward()
            x=x-1
        end
        turtle.turnRight()
        turtle.turnRight()
        if y>1 then
            while turtle.detectUp() do
                turtle.digUp()
            end
            turtle.up()
        end
        y=y-1
    end
    x=ix-1
    y=iy-1
    while x>0 do
        turtle.forward()
        x=x-1
    end
    while y>0 do
        turtle.down()
        y=y-1
    end
    turtle.turnRight()
    d=d-1
end