trouble with analog inputs

hi im trying find code  alow me blink led when arduino  recevies analog input exelerometer tips or code helpfull. thanks. got folowing snipit member ive been strugaling incorporate in full runable code. :-?




int analogval = analogread(somepin);
if(analogval > somerandomnumber)
{
  // random thing
}

i far expert, giving try anyways

code: [select]


int ledpin =  13;    // led connected digital pin 13

void setup() {                
 // initialize digital pin output:
 pinmode(ledpin, output);    
}


void loop() {
 int analogval = analogread(somepin);
 if(analogval > somerandomnumber) {
   digitalwrite(ledpin, high);   // set led on
   delay(1000);                  // wait second
   digitalwrite(ledpin, low);    // set led off
   delay(1000);                  // wait second
 }  
}


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