test

function gehen()
  turtle.forward()
  while(turtle.forward()==false) do
    turtle.dig()
  end
end


function baum()
  turtle.up()
  while(turtle.up()==false) do
      turtle.digUp()
end
end

gehen()
while(turtle.detectUp()) do
baum()
end
while(turtle.detectDown()==false) do
turtle.down()
end
write("FERTIG")