Why do the hazard lights keep flashing for about 30 seconds then turn off for about 20 seconds and immobilizer light keeps flashing even with the key in the ignition on a 2000 daewoo lanos se?

The flashing hazard lights and immobilizer light on your 2000 Daewoo Lanos SE suggest that the vehicle's security system is activated, indicating a potential issue with the key or the immobilizer's recognition of it. The 30-second flashing followed by a 20-second pause is likely a programmed response of the system, which may be trying to deter theft or alert you to a malfunction. Check the key's transponder chip for damage or try using a spare key, as the issue may stem from a failure in the key's signal. If the problem persists, consulting a professional mechanic or dealership may be necessary to diagnose and resolve the immobilizer system issue.