program

function fuel()
while true do
if turtle.getFuelLevel() <= 100 then
  turtle.select(16)
  fueln = turtle.getItemCount()
  if fueln >= 1 then
    turtle.refuel()
  else
    while true do
      down, t = turtle.inspectDown()
      if t.name == "minecraft:chest" then
        turtle.suckDown()
        turtle.refuel()
        sleep(1)
        break
      else
        turtle.down()
      end

    end

  end

else
  break
end
end
end

function fell()
  turtle.select(1)
  if turtle.detect() == true then
    turtle.dig()
    turtle.digUp()
    turtle.up()
    d = true
   else
     d = false
   end
end

while true do
  fuel()
  fell()
  if d == false then
    turtle.down()
  end
  lo, y = turtle.inspectDown()
  if y.name == "minecraft:chest" then
     turtle.select(1)
     turtle.dropDown()
     turtle.select(2)
     turtle.dropDown()
     turtle.select(3)
     turtle.dropDown()
     turtle.select(4)
     turtle.dropDown()
     turtle.select(5)
     turtle.dropDown()
  end
end