This morning, on the church newsletter were these instructions:

Hold this paper close to your nose and blow hard into the paper.

If the sheet turns green, you need to see a doctor.

If it turns blue, see your dentist.

If it turns red, see your bank manager.

If it turns black, you need to check your will, so see your lawyer immediately.

If, however, it does not change color, then there is nothing wrong with you, so there is no reason why you should not be in church again next week.