chunkExcavation

function line()
    for i = 1, 15 do
        turtle.digUp()
        turtle.dig()
        turtle.dig()
        turtle.digDown()
        turtle.forward()
        end
    end

function turnRightWay()
    turtle.turnRight()
        turtle.digUp()
        turtle.dig()
        turtle.digDown()
    turtle.forward()
    turtle.turnRight()
    end

function turnLeftWay()
    turtle.turnLeft()
        turtle.digUp()
        turtle.dig()
        turtle.digDown()
    turtle.forward()
    turtle.turnLeft()
    end

function layerRight()
    for i = 1, 7 do
        line()
        turnRightWay()
        line()
        turnLeftWay()
        end
    line()
    turnRightWay()
    line()
    turtle.turnRight()
    turtle.turnRight()
    turtle.digUp()
    turtle.digDown()
    end

function layerLeft()
    for i = 1, 7 do
        line()
        turnLeftWay()
        line()
        turnRightWay()
        end
    line()
    turnLeftWay()
    line()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.digUp()
    turtle.digDown()
    end

function layerDown()
    turtle.down()
    turtle.digDown()
    turtle.down()
    turtle.digDown()
    turtle.down()
    end

while(true) do
    layerRight()
    layerDown()
    layerLeft()
    layerDown()
    end