Gas is funneled to the tip of a pilot light via a supply line that is connected to a natural gas or propane supply.
How to light the pilot light on a wall heater.
Here is how to light the pilot light on a gas heater.
Turn the thermostat to its lowest setting.
Press inward on the valve.
Step 4 press down the red button next to the control valve and keep pressing while you hold a lighted match or lighter next to the pilot orifice.
When the pilot lights remove the flame but keep pressing the button.
As the gas passes through the tip of the pilot light it is ignited by the action.
Turn the control valve on the heater until the marker that says pilot is lined up with the marker on the outside casing.