int led=2;
int port=A2;
int botton=3;
void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
pinMode(botton, INPUT);
}


void loop() {
  // put your main code here, to run repeatedly:
int val= analogRead(port);
if 
 ( digitalRead(botton)==1)
 {
digitalWrite(led,1);
delay(val);
}
else 
{
digitalWrite(led,0);
delay(val);
}
}