for i=1, 50 do
if turtle.getFuelLevel() < 100 then
turtle.select(16)
turtle.refuel(1)
end
turtle.select(1)
turtle.digDown()
for p=1,48 do
turtle.up()
end
if turtle.placeUp() then
print(g)
else
turtle.drop()
end
for p=1,49 do
turtle.down()
end
end