|You will find that people are more willing to help if you actually ask for help instead of just stating what you want to do. A "Please" and "Thank you" go a long way in this forum.|
Please review the Excel Help files for the IF function. They explain how to build a Nested IF statement.
To get the results you want, this might work:
Since you didn't say what you want to see if A1 is <15, this formula will give you an empty cell in that case.