CANT GET SKETCH TO WORK ON ATTINY 85 ONLY WORKS WITHOUT AM I WIRING IT WRONG? Answered

HI GUYS. I HAVE A LDR light sensor I would like to use to turn on a light bulb through a attin85. when I upload the sketch to the Arduino it works fine. but when I upload to the attiny, I can't get it to work. am I'm wiring it wrong? when I put my signal from my ldr sensor to AO and 2 to the led it works on Arduino, but when I do that with the Attiny85 it doesn't do anything. The sketch did upload correctly though so it has to be me wiring it wrong or I need to change the code maybe to cater to the attiny85?

my sketch is

int LDR = 0;
int LDRValue = 0;

void setup()

{

pinMode(2, OUTPUT);

void loop()

{

LDRValue = analogRead(LDR);

delay(50);

if (LDRValue < light_sensitivity)

{

digitalWrite(2, HIGH);

}

else

{

digitalWrite(2, LOW);

}

}