Elevator, For code compass

function toTop()
  if rs.testBundledInput("back", colors.black) == true then
    print("Already on top floor, sending back down")
    for i = 1,16 do
      rs.setBundledOutput("back", colors.white)
    end
  else
    for i = 1,16 do
      rs.setBundledOutput("back", colors.orange)
    end
  end
end
function toBottom()
  if not rs.testBundledInput("back", colors.black) then
    print("Already on bottom floor, sending back up")
    for i = 1,16 do
      rs.setBundledOutput("back", colors.orange)
    end
   else
    for i = 1,16 do
      rs.setBundledOutput("back", colors.white)
    end
  end
end
while true do
  if rs.testBundledInput("back", colors.lime) then
    toBottom()
  end
  if rs.testBundledInput("back", colors.grey) then
    toTop()
  end
end