Turtle

function turn(direction, times)
	times = times or 1
	for i = 1, times, 1 do
		if direction == "right" then
			turtle.turnRight()
		elseif direction == "left" then
			turtle.turnLeft()
		end
	end
end

function swapRowDirection(currentDir)
	if currentDir == "right" then
		currentDir = "left"
	else
		currentDir = "right"
	end
end

function swapColDirection(currentDir)
	if currentDir == "up" then
		currentDir = "down"
	else
		currentDir = "up"
	end
end

function sForward(times)
	times = times or 1
	for i = 1, times, 1 do
		if not turtle.forward() then
			return i - 1
		end
	end
	return times
end

function sUp(times)
	times = times or 1
	for i = 1, times, 1 do
		if not turtle.up() then
			return i - 1
		end
	end
	return times
end

function sDown(times)
	times = times or 1
	for i = 1, times, 1 do
		if not turtle.down() then
			return i - 1
		end
	end
	return times
end