Quarry 0.3

turtle.refuel()
print("How much should I dig?")

area = io.read()

for i=1,area do
    for j=1,area do
        while turtle.detect() do turtle.dig() end
        while turtle.detectUp() do turtle.digUp() end
        turtle.digDown()
        turtle.suckDown()
        if i%6==0 and j%6==0 then turtle.placeDown() end
        turtle.forward()
    end
    if i%2 == 0 then
        turtle.turnLeft()
        turtle.dig()
        turtle.forward()
        turtle.digUp()
        turtle.digDown()
        turtle.turnLeft()
    else
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        turtle.digUp()
        turtle.digDown()
        turtle.turnRight()
    end
end