2002 Other Saturn Models antifreeze

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