local sideLen = 5
local aboveGround = 2

function turn(right)
    if right then turtle.turnRight()
    else turtle.turnLeft()
    end
end

function digLine()
    for i=1,sideLen do
        turtle.dig()
        turtle.forward()
    end
end

function digLayer()
    local right = true
    for i=1,sideLen do
        digLine()
        turn(right)
        turtle.dig()
        turtle.forward()
        turn(right)
        right = not right
    end
end


for i=1,aboveGround do
    turtle.digDown()
    turtle.down()
    digLayer()
end