Turtle Break Trail

-- pastebin get Xr2JU3p8 breakBox

print("Put an item for me to detect in slot #1.")
print("Put coal in slot #16.")
print("Type 'Start' when ready")

local go = io.read()

local selected = 1
local fuel = 16

--[[
* Check to see if refueling is needed
]]
local function ifRefuel()
	if turtle.getFuelLevel() < 1 then
		turtle.select(fuel)
		turtle.refuel(1)
		turtle.select(selected)
	end
end

if go == "Start" then
	-- Select the starting cell
	turtle.select(selected)

	while true do
		ifRefuel()

		if turtle.compare() then
			-- Block detected
			turtle.dig()
			turtle.forward()
		else
			-- Look around
			turtle.turnLeft()

			if turtle.compare() then
				-- Found the next path; Continue
				turtle.dig()
				turtle.forward()
			else
				turtle.turnRight()
				turtle.turnRight()

				if turtle.compare() then
					turtle.dig()
					turtle.forward()
				else
					-- We're done!
					break
				end
			end
		end
	end

	print("Done!")
else
	print("Terminating")
	return
end