The air intake is located on the bottom or side of the water heater and may need to be cleaned out in order for the pilot to stay lit. If you don’t see a spark at all when you are trying to light your pilot it may be that you are not looking in at the right angle. You have to put your ear down to the floor to see the pilot.
Indicator lights, also called pilot lights, in all sizes and ready to panel mount. Readily available from stock, low pricing. The basics: a small electric light used to indicate something... often used to show an operating condition or whether power is on, these lights come in a range of colors and voltages.