MultiCurve

os.loadAPI("TTLib")
TTLib.restock()

curve = fs.open("Curve2Curve-1.dat","r")
cur = curve.readLine()
while #cur > 0 do
	x = 0
	y = 0
	for a = 1,#cur do
	  c = string.sub(cur,a,a)
	  if c == "F" then
		turtle.forward()
		x = x + 1
	  end
	  if c == "P" then turtle.placeDown() end
	  if c == "R" then turtle.digDown() end
	  if c == "U" then
		turtle.up()
		y = y - 1
	  end
	  if c == "D" then
		turtle.down()
		y = y + 1
	  end
	  if c == "B" then
		turtle.turnLeft()
		turtle.turnLeft()
		turtle.place()
		turtle.turnLeft()
		turtle.turnLeft()
	  end
	  TTLib.restock()
	end

	turtle.turnLeft()
	turtle.turnLeft()
	for a = 1,y+1 do
	  turtle.up()
	end
	for a = 1,x do
	  turtle.forward()
	end
	turtle.turnLeft()
	turtle.forward()
	turtle.turnLeft()
	turtle.down()

	cur = curve.readLine()
end