Feller

m = peripheral.wrap("right")
m.open(100)

function refuel()
  turtle.select(16)
  turtle.refuel(31)
  turtle.transferTo(10)
  turtle.select(1)
end

function tree()
  if turtle.detect() then
    turtle.dig()
    turtle.forward()
    while turtle.detectUp() do
      turtle.digUp()
      turtle.up()
    end
    while not turtle.detectDown() do
      turtle.down()
    end
    turtle.digDown()
    turtle.placeDown()
  else
    turtle.forward()
  end
end

function forward(x)
  for j = 1, x do
    turtle.forward()
  end
end

while true do
  event = { os.pullEvent("modem_message") }
  if event[5] == "chop" then
    if turtle.getFuelLevel() < 1000 then refuel() end
    turtle.suck()
    turtle.turnRight()
    turtle.turnRight()
    forward(3)
    tree()
    turtle.turnRight()
    for i = 1, 3 do
      forward(2)
      tree()
    end
    turtle.turnLeft()
    forward(2)
    tree()
    turtle.turnLeft()
    for i = 1, 3 do
      forward(2)
      tree()
    end
    turtle.turnLeft()
    forward(2)
    tree()
    forward(3)
    for i = 1, 5 do
      turtle.up()
    end
    for i = 2, 10 do
      turtle.select(i)
      turtle.drop()
    end
    turtle.select(1)
    for i = 1, 5 do
      turtle.down()
    end
     turtle.forward()
  end
end