chopper

if turtle.getFuelLevel() < 20 then
    turtle.refuel();
end
m = 0
i = 0

while i == 0 do
  if turtle.inspect("17:2") then
    turtle.dig();
    turtle.digUp();
    turtle.up();
    m=m+1;
  else
    turtle.down(m);
    turtle.place();
    end
end