Redwood chopper by seriallos

--[[
Redwood chopper
Place at the base of a redwood tree and let 'er rip
--]]

turtle.refuel(1)
-- dig into the tree one space
turtle.dig()
turtle.forward()
-- figure out if we're on the left or right side of the tree
-- check left first
turtle.turnLeft()
if false == turtle.detect() then
turtle.turnRight()
end
-- chop the current level then move up
doneClimbing = false
repeat
-- first spot is already dug
for i = 1, 3 do
turtle.dig()
turtle.forward()
turtle.turnRight()
end
-- if there's something above, dig it
if turtle.detectUp() then
turtle.digUp()
turtle.up()
else
-- otherwise we're done
doneClimbing = true
end
until doneClimbing
-- safely back to the ground
while false == turtle.detectDown() do
turtle.down()
end