function main()
	while true do
		collect()
		clearInventory()
		goBack()
		refillInventory()
	end
end

function collect()
	turtle.turnRight()
	turtle.turnRight()
	for i=0,14 do
	    turtle.placeDown()
		while not turtle.forward() do

		end
	end
	turtle.placeDown()
end

function goBack()
	turtle.turnRight()
	turtle.turnRight()
	for i=0,14 do
		while not turtle.forward() do
			os.queueEvent("randomEvent")
			os.pullEvent()
		end
	end
end

function clearInventory()
	local tmp = false
	if turtle.getFuelLevel()<500 then
		tmp = true
	end
	for i=1,16 do
		turtle.select(i)
		if tmp then
			turtle.refuel()
		end

		while not turtle.drop() do
			os.queueEvent("randomEvent")
			os.pullEvent()
		end

	end
end

function refillInventory()
	turtle.suck(16)
end

main()