To light your pilot you will need to find the gas valve assembly. It will be a block of aluminum with a plastic knob and a few pipes attached to it. Once you find it, rotate the knob to the pilot marking on the knob. You will know when you are at the proper setting because you will be able to depress the knob into the gas valve about 3/8". Once you do that, there will be a small red button which you can snap causing a spark at the pilot. There may ba a small viewing port covered by a removable metal shield. OK, Depress and hold in the knob, snap the red button a few times. Keep holding the knob in, look into the viewing port for a blue flame. If no flame, snap the button a few more times looking for a spark. Once you see the flame stop snapping but continue to hold the knob in. Count to 30. Slowly let the knob out watching that the flame stays on. If it starts to go out, quickly depress the knob and hold for a minute. If it continues to go out, you have a bad thermocouple and it is not letting the pilot stay lit. If it stays lit, rotate the knob to On. A few seconds later and if the unit is calling for heat, it should light the main burner. If you need a new thermocouple, go to a good hardware store or Farm Center (bring the old part with you) and ask for a new one.