function fuelCheck()
	while turtle.getFuelLevel() < 1 do
		select(1)
		turtle.refuel()
		if turtle.getFuelLevel() < 1 then
			print("Out of fuel, refuel failed. Please put fuel in slot 1, then press enter to continue!")
			read()
		end
	end
end

function forward()
	fuelCheck()
	if not turtle.forward() then print("Forward Error! Fix issue and press enter to continue!") read() end
end

function back()
	fuelCheck()
	if not turtle.back() then print("Forward Error! Fix issue and press enter to continue!") read() end
end

index = 0

while not turtle.detect() do
	forward()
	index = index + 1
	print(index)
end
for i=1,index do
	back()
end
print("Distance was: "..index.." blocks")