FTB Server Crash

while true do

  if rs.getInput ("back", false) then
    rs.setOutput ("back", true)
  end


  if rs.getInput ("right", true) then
    rs.setOutput("front", true)
    rs.setOutput("left", false)
  end

  if rs.getInput ("right", false) then
    rs.setOutput ("left", true)
  end
end