Can't get the analog value - gas sesnor

[system]

Hi

I bought the sensor MQ4.
And I try get analog value , but can't it.
My try code are,

#define analogInDatPin 0
int sensorValue = 0;
void setup()
{Serial.begin(9600);}
void loop()
{

sensorValue = analogRead(analogInDatPin);
Serial.print("sensor test value = ");
Serial.println(1023-sensorValue);
delay(300);
}

I tried this and got the random number.

[TomGeorge]

Hi,
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png or pdf.

Tom....