CC vertical strip miner

yMax=80
function goDown()
b=''
while b~='Unbreakable block detected' do
turtle.down()
a,b=turtle.digDown()
end
end

function goUp()
for i=1,yMax do
turtle.digUp()
turtle.up()
end
end

function loadOut()
if turtle.getItemCount()>0 then
turtle.digUp()
turtle.placeUp()
for n=2,16 do
turtle.select(n)
turtle.dropUp()
end
turtle.select(1)
end
end

while true do
goDown()
turtle.dig()
turtle.forward()
goUp()
loadOut()
turtle.dig()
turtle.forward()
end