2002 Other Saturn Models antifreeze

Engine Cooling problem
2002 Other Saturn Models 4 cyl Wheel Drive Type unknown Automatic 92,000 miles

for about a week or so my low antifreeze light has come on after I add antifreeze one or two days later the antifreeze light is back on I did not see any leaks until today but the leak looks like oil but smell like antifreeze please help thank you