int x;
int y;
void setup()
{
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(6,OUTPUT);
pinMode(A0,INPUT);
}

void loop()
{
x=analogRead(A0);
y=map(x,0,1023,0,255);
analogWrite(6,y);
digitalWrite(2,HIGH);
digitalWrite(3,HIGH);
}